Move Free Ultra with Type II Collagen by Schiff

LIKELY EFFECTIVE

• Boron deficiency. Oral boron treats and prevents boron deficiency. Details: Taking boron orally is effective for preventing and treating boron deficiency (7135).

POSSIBLY EFFECTIVE

• Radiation dermatitis. Topical application of sodium pentaborate pentahydrate gel to radiation sites may reduce the risk of dermatitis in patients with breast cancer who are receiving radiotherapy. Details: A small clinical study in patients with breast cancer shows that applying a hydrogel containing sodium pentaborate pentahydrate 3% four times daily during radiotherapy for 5 weeks reduces the risk of moderate to severe dermatitis by 50% when compared with petroleum jelly (Vaseline). However, there is no difference in patient satisfaction (95660). Additionally, a larger clinical trial in patients with breast cancer shows that applying a sodium pentaborate pentahydrate 3% gel to radiation sites 15 minutes before each session for 25 sessions reduces the risk of dermatitis by 90%, erythema by 87%, dry desquamation by 92%, and moist desquamation by 97% when compared with a placebo gel (109557).
• Vaginal candidiasis. Boric acid applied intravaginally seems to reduce vaginal candidiasis. Details: Some limited clinical research shows that applying boric acid powder intravaginally 600 mg once or twice daily for up to 3 weeks can treat candidiasis and other vaginal fungal infections, including resistant and chronic infections (15443,15444,15446,15449,15450,15451,15453); however, this research is limited by low study quality. For Candida glabrata yeast infections, which are less prevalent than Candida albicans infections, some evidence shows that intravaginal boric acid capsules are effective in about 65% to 70% of azole-resistant infections; however, boric acid capsules appear to be less effective than intravaginal flucytosine (Ancobon) (15445,15454). For Candida krusei infections, which are rare and resistant to azole antifungal treatment, boric acid capsules also appear to be effective in some cases (15448).

POSSIBLY INEFFECTIVE

• Athletic performance. Oral boron does not seem to improve athletic performance. Details: A small clinical study in male bodybuilders shows that taking boron 2.5 mg daily for 7 weeks does not increase lean body mass, muscle mass, or testosterone levels when compared with placebo (944). Furthermore, the International Society of Sports Nutrition (ISSN) does not recommend boron supplementation as a nutritional ergogenic aid due to a lack of supportive evidence (101009).

INSUFFICIENT RELIABLE EVIDENCE to RATE

• Age-related cognitive decline. It is unclear if oral boron is beneficial for age-related cognitive decline. Details: Two very small clinical studies in healthy older adults show that taking boron 3.25 mg daily for up to 49 days orally might improve cognitive function and fine motor skills when compared with lower amounts of boron (943).
• Diabetic foot ulcers. It is unclear if topical boron is beneficial for use in diabetic foot ulcers. Details: A large clinical study in adults with diabetic foot ulcers shows that applying boron (sodium pentaborate 3%) gel twice daily for 1 month marginally reduces ulcer severity, measured by the Wagner Classification system at 25 days and 2 months, when compared with control; recurrence and infection rate were also modestly reduced at 2 months (112423). However, it is unclear whether the analysis controlled for systemic antibiotic use among the two groups, which effects the validity of these findings.
• Dysmenorrhea. It is unclear if oral boron is beneficial for reducing pain during menstruation. Details: A small clinical study in young females with moderate to severe dysmenorrhea suggests that taking boron tetraborate 10 mg daily, starting two days before and continuing until three days after the start of menstruation for two menstrual cycles, reduces pain levels by 24% and pain duration by 1.5 hours, or 34%. Both pain and pain duration were decreased by only 9% in patients receiving placebo (95428).
• Kidney stones (nephrolithiasis). It is unclear if boron is beneficial for medical expulsive therapy after extracorporeal shockwave lithotripsy. Details: A large clinical study in adults undergoing extracorporeal shockwave lithotripsy for kidney stones conducted in Iran shows that taking boron 10 mg twice daily for 2 weeks does not statistically improve the rate of stone expulsion when compared with tamsulosin; however, boron may have fewer side effects (i.e., orthostatic hypotension, headache, nausea, erectile dysfunction) (112414).
• Kidney transplant. It is unclear if oral boron is beneficial in patients receiving a kidney transplant. Details: Observational research in kidney transplant recipients has found that higher boron intake, as measured by urinary boron levels, is associated with a lower risk of mortality when compared with lower intake. Patients with 24-hour urinary boron levels in the top tertile had a 49% lower risk of all-cause mortality when compared with those in the lowest tertile; however, there was no association with graft failure (109556). It is unclear if these findings can be generalized to boron supplements.
• Obesity. Although there has been interest in using oral boron for obesity, there is insufficient reliable information about the clinical effects of boron for this purpose.
• Osteoarthritis. It is unclear if oral boron is beneficial for osteoarthritis symptoms. Details: Small low quality studies in patients with osteoarthritis suggest that taking boron tetraborate 3-6 mg daily for up to 8 weeks might improve pain and other symptoms when compared with a lower intake of boron (941,36870).
• Osteoporosis. It is unclear if oral boron is beneficial for osteoporosis. Details: Preliminary clinical research in postmenopausal adults shows that taking boron 3 mg daily does not improve bone density when compared with placebo (36872).
• Periodontitis. Small clinical studies suggest that adding topical boric acid to scaling and root planing treatment may be beneficial in periodontitis. Details: A meta-analysis of four small clinical studies in 117 patients with periodontitis shows that using boric acid 0.75% gel or solution in addition to scaling and root planing seems to slightly improve probing pocket depth (PPD) and clinical attachment level (CAL) when compared with placebo or saline control (105690). Another small clinical study in patients with periodontitis shows that using boric acid 0.5% for irrigation in addition to scaling and root planing seems to improve CAL and PPD to a similar degree as using povidone-iodine 0.1% (105691). The available research was conducted in Turkey, Vietnam, and India; it is unknown if these findings are generalizable to other geographic locations.
• Tooth extraction. It is unclear if boron is beneficial for use in periodontal healing after impacted third molar surgery. Details: A moderate-sized clinical study in adults 18 to 40 years old shows that using boron 0.1% to 2.5% and chlorhexidine 0.12% mouthwash for 7 days after impacted third molar surgery marginally improves swelling and self-reported pain on day 7, and the higher boron concentrations also improve pain at day 4 when compared with chlorhexidine alone, but does not improve the number of analgesics used or periodontal scores (112379). However, the validity of these results is limited by a lack of statistical adjustment for multiple comparisons which can lead studies to show differences between treatment groups in error (i.e., false positive findings). Additionally, the study period coincides with the expected recovery time (i.e., 2-7 days), making it unclear if any effects are due to the intervention or control. More evidence is needed to rate boron for these uses.

(Read more about BORON)

POSSIBLY EFFECTIVE

• Osteoarthritis. Oral collagen type II seems to improve stiffness, pain, and function by a small amount in patients with knee osteoarthritis, but any benefit on joint space narrowing is unclear. Details: Clinical research in patients with knee osteoarthritis shows that taking a specific collagen type II (UC-II, InterHealth Nutraceuticals, Inc.) 40 mg daily for up to 6 months reduces symptoms, such as stiffness, pain, and physical functioning, by about 20% when compared with baseline (97238,97239). Taking this product might also improve some symptoms, such as pain and stiffness, when compared with glucosamine 1500 mg plus chondroitin 1200 mg (97239). A small clinical study in patients with knee osteoarthritis and type 2 diabetes shows that taking a specific collagen type II (UC II, SEMNL Biotechnology) 40 mg daily for 3 months improves pain by 36%, compared with 5% in those receiving placebo (107466). It is unclear if taking collagen type II is more beneficial than exercise. A small clinical study in females with knee osteoarthritis shows that taking a specific collagen type II (Motilex Caps, Aspen Pharmaceutics) at an unknown dose daily for 6 weeks may improve physical functioning and pain but does not improve range of motion when compared with usual care. However, physical functioning, rigidity, and pain were not improved when compared with twice-weekly standardized exercise (110734). Collagen type II is also studied in combination with other ingredients. A small clinical study shows that taking a specific combination product (AR7 Joint Complex, Robinson Pharma) containing collagen type II, methylsulfonylmethane (MSM), cetyl myristoleate, lipase, vitamin C, turmeric, and bromelain orally for 12 weeks reduces symptoms, with 43% and 46% of patients reporting joint pain and stiffness, respectively, compared with 71% and 71% in those receiving placebo. However, the combination product does not appear to improve joint space narrowing (19314).

POSSIBLY INEFFECTIVE

• Rheumatoid arthritis (RA). Despite some conflicting results, oral collagen type II does not seem to improve symptoms of RA when compared with standard treatments. Details: Three moderately large clinical studies in patients with RA, some of whom were using disease modifying antirheumatic drugs (DMARDs), show that taking chicken collagen type II 100-2500 mcg daily or bovine collagen type II 100-500 mcg daily for 6 months does not improve clinical response rates based on American College of Rheumatology (ACR) criteria when compared with placebo (3111,44446,101718). Other clinical research in patients stabilized on oral methotrexate shows that switching to chicken collagen type II 500 mcg orally daily actually increases disease activity when compared with continued treatment with methotrexate (44456). While some clinical research in patients not taking DMARDs shows that taking chicken collagen type II 100 mcg daily may reduce symptoms, the response rates based on ACR20 and ACR50 criteria are greater for patients treated with methotrexate 10 mg weekly when compared with chicken collagen type II (44451,101717). One clinical study shows that taking low dose chicken collagen type II 20 mcg daily for 24 weeks improves clinical response according to the Paulus criteria, but not according to the ACR criteria, when compared with placebo. Other preliminary research in patients who discontinued treatment with immunosuppressants and DMARDs shows that taking chicken collagen type II 100 mcg orally daily for 1 month, followed by 500 mcg daily for 2 months, improves symptoms in some patients when compared with placebo (44454).

INSUFFICIENT RELIABLE EVIDENCE to RATE

• Back pain. Although there has been interest in using oral collagen type II for back pain, there is insufficient reliable information about the clinical effects of collagen type II for this condition.
• Gout. Although there has been interest in using oral collagen type II for gout, there is insufficient reliable information about the clinical effects of collagen type II for this condition.
• Joint pain. Oral collagen type II may modestly reduce joint pain. Details: A small clinical study in patients with joint pain due to exercise shows that taking a specific collagen type II product (UC-II, InterHealth Nutraceuticals, Inc.) 40 mg daily for 4 months may increase the duration of pain-free exercise by about 1.5 minutes when compared with baseline (101744). Another small clinical study in patients with non-arthritic knee pain shows that taking a specific chicken-derived collagen type II product (NEXT-II, Ryusendo Co.) 3.2 mg daily for 12 weeks modestly improves knee pain, stiffness, and function when compared with placebo (110733). However, it is unclear whether these results apply to patients with overweight or obesity since they were excluded from this study.
• Juvenile idiopathic arthritis (JIA). It is unclear if oral collagen type II is beneficial for JIA. Details: Some small clinical studies show that taking chicken collagen type II may improve symptoms such as swollen and tender joint scores when compared with baseline in some patients. However, the lack of a control group in these studies limits the reliability of these results (3112,101719).
• Neck pain. Although there has been interest in using oral collagen type II for neck pain, there is insufficient reliable information about the clinical effects of collagen type II for this condition.
• Pain (acute). Although there has been interest in using oral collagen type II for acute pain after trauma, there is insufficient reliable information about the clinical effects of collagen type II for this condition.
• Postoperative pain. Although there has been interest in using oral collagen type II for joint pain after surgery, there is insufficient reliable information about the clinical effects of collagen type II for this condition.
• Range of motion. It is unclear if oral collagen type II improves range of motion; study results are in conflict. Details: Small clinical studies in healthy people with joint pain due to exercise who took a specific collagen type II product (UC-II, InterHealth Nutraceuticals, Inc.) have conflicting results (101744,110732). In one study, taking 40 mg daily for 4 months increases knee extension by about 6 degrees when compared with placebo, but does not improve knee flexion (101744). However, the other study shows that taking 40 mg daily for 6 months does not improve knee extension but increases knee flexion by about 3 degrees when compared with placebo (110732). Results are similar in a small clinical study in patients with non-arthritic knee pain. In this study, taking a specific chicken-derived collagen type II product (NEXT-II, Ryusendo Co.) 3.2 mg daily for 12 weeks does not improve knee extension but increases knee flexion by about 5 degrees when compared with placebo (110733).
• Urticaria. Although there has been interest in using oral collagen type II for urticaria associated with stress, there is insufficient reliable information about the clinical effects of collagen type II for this condition.
• Uveitis. It is unclear if oral collagen type II is beneficial for uveitis. Details: Preliminary clinical research in children with uveitis associated with juvenile idiopathic arthritis shows that taking collagen type II (Colloral, AutoImmune Inc.) 60 or 540 mcg daily for 6 months does not improve ophthalmic outcomes when compared with baseline (101719). More evidence is needed to rate collagen type II for these uses.

(Read more about COLLAGEN TYPE II (NATIVE))

POSSIBLY EFFECTIVE

• Dry eye. Applying eye drops containing hyaluronic acid alone or in combination with other ingredients, seems to improve symptoms of dry eye. Details: A large meta-analysis of clinical studies in patients with dry eye disease shows that using eye drops containing hyaluronic acid 0.1% to 0.4% for at least 14 days modestly improves tear production when compared with artificial tears or saline control, with a more significant improvement when compared with saline control. Tear stability is also modestly improved when compared with saline control (108622). Several individual clinical studies using specific hyaluronic acid eye drops have also demonstrated improvement. One clinical study in patients with dry eye disease shows that applying eye drops containing hyaluronic acid 0.1% to 0.3% 5-6 times daily for 12 weeks might improve symptoms to a similar degree as cyclosporine 0.05% eye drops. The products used in this study included Hyalein ophthalmic solution 0.1%, New Hyaluni ophthalmic solution 0.15%, and Hyaluni ophthalmic solution 0.3% (97885). Another clinical study shows similar efficacy between hyaluronic acid 0.15% eye drops (New Hyaluni), applied 6 times daily for 12 weeks, and eye drops containing cyclosporine 0.05% and carboxymethylcellulose 0.5%, applied twice daily (110555). A smaller clinical study in patients with dry eye disease shows that applying specific eye drops containing hyaluronic acid 0.2% (Hyalistil) seems to have similar efficacy as using tamarind seed polysaccharide eye drops (16301). Furthermore, adding hyaluronic acid to conventional treatment seems to offer additional benefit. A large multicenter clinical trial in patients with dry eye disease shows that applying 1-2 drops of artificial tears containing carboxymethylcellulose 0.5% and hyaluronic acid 0.1% (Optive Fusion, Allergan) at least 2 times daily for 3 months seems to further improve pain and discomfort when compared with using artificial tears containing carboxymethylcellulose alone (104384). One small clinical study also shows that hyaluronic acid 0.3% ocular gel and hyaluronic acid 0.18% eye drops, applied 4-6 times daily for 12 weeks, are equally effective for improving dry eye symptoms (110556). Hyaluronic acid has also been studied in combination with other ingredients. Several small clinical studies in patients with dry eye syndrome ranging from mild to severe shows that applying eye drops containing hyaluronic acid 0.2% or 0.3%, polyvinylpyrrolidone, and glycerin (Visaid 0.2% or 0.3%, Avizor S.A.), administered as one drop 3-8 times daily for one month, improves some signs and symptoms of dry eye when compared with sodium chloride 0.9% (97894,97895). Conversely, a large clinical study in patients with mild to moderate dry eye disease shows that applying preservative-free eye drops containing sodium hyaluronate with chondroitin sulfate (Humylub Ofteno PF, Laboratorios Sophia), one drop into each eye four times daily for 90 days, seems to be no different for improving dry eye severity when compared with using polyethylene/propylene glycol eye drops (104443).
• Venous leg ulcers. Topical application of hyaluronic acid-impregnated gauze reduces wound size and promotes wound healing. Details: Clinical studies in patients with at least one leg ulcer of venous or mixed arterial/venous origin show that once daily application of a specific hyaluronic acid-impregnated gauze (Ialuset, Laboratoires Genévrier) reduces wound size at 45 days by 73% and produces complete wound healing at or before 20 weeks in 40% of patients. In those receiving a neutral vehicle gauze, these improvements occurred in 46% and 19% of patients, respectively (108627,108640).

INSUFFICIENT RELIABLE EVIDENCE to RATE

• Aging skin. Oral hyaluronic acid has only been evaluated in combination with other ingredients; its effect when used alone is unclear. It is also unclear if topical hyaluronic acid is beneficial for aging skin. Details: A very small study shows that taking a specific combination product (GliSODin Skin Nutrients Advanced Anti-Aging Formula, Isocell North America Inc.) containing hyaluronic acid, krill oil, sea buckthorn berry oil, and cacao bean extract orally three times daily for 90 days, along with applying tazarotene 0.1% cream, moderately decreases wrinkling and photodamage and improves skin moisture and elasticity when compared with tazarotene cream alone (91778). Another small clinical study in females with aging skin shows that taking a specific combination product (BioCell Collagen, BioCell Technology, LLC) containing hyaluronic acid 100 mg, chondroitin sulfate 200 mg, and collagen peptides 600 mg daily for 12 weeks reduces lines and wrinkles by about 13% when compared with baseline (28681). The validity of this finding is limited by the lack of a comparator group. Furthermore, it should be noted that both studies were funded by the product manufacturer. A small open-label clinical study in females with mild to moderate lip dryness and mild to severe lip condition shows that three daily applications of a two-step lip treatment containing hyaluronic acid for 4 weeks improves the overall condition of lips, as well as texture/visual roughness, plumpness, color/rosiness, definition/contour, and lines/wrinkles when compared with baseline (108634). The validity of these findings is limited by the lack of a comparator group.
• Allergic rhinitis (hay fever). It is unclear if nasal irrigation with sodium hyaluronate is beneficial in patients with mild, persistent seasonal allergic rhinitis. Details: A small clinical study in patients with mild, persistent seasonal allergic rhinitis receiving an oral antihistamine and an intranasal corticosteroid shows that nasal irrigation with sodium hyaluronate twice daily for 1 month improves mucociliary clearance time by 3 minutes, compared with 1 minute with the use of isotonic saline and 5 minutes with the use of surfactant (108630). It is unclear if this change is associated with clinically relevant symptom improvement.
• Burns. It is unclear if topical hyaluronic acid is beneficial in patients with burns. Details: A meta-analysis of small clinical trials suggests that topical hyaluronic acid and hyaluronic acid derivatives might improve the healing of wounds, including burns, when compared with control (104389). A small nonrandomized clinical study in patients with partial- to full-thickness burns shows that hyaluronic acid 0.2% gel daily for 12 weeks during the re-epithelialization phase reduces erythema, tension, pruritus, burning, and neoangiogenesis when compared with baseline (108636). The lack of statistical comparison to the ozonated oil group and the single-blinded nature of the study limit the validity of these findings.
• Canker sores. It is unclear if topical hyaluronic acid is beneficial for canker sores. Details: A clinical study in adults with recurrent canker sores shows that applying a gel containing hyaluronic acid 0.2% two to three times daily for 7 days reduces soreness immediately and for up to 30 minutes after application when compared with baseline. However, these improvements are numerically similar to those seen with placebo (108637). The lack of statistical comparison to placebo limits the validity of this finding. A small observational study in children with recurrent canker sores has found that applying a gel containing hyaluronic acid 0.2% twice daily for 7 days is similarly effective to dexamethasone topical ointment applied three times daily for 5 days for reducing pain and ulcer size (104388).
• Corneal abrasion. It is unclear if eye drops containing hyaluronic acid are beneficial in preventing recurrence in patients with a history of traumatic corneal abrasion. Details: A small clinical study in patients with fully healed traumatic corneal abrasion at risk for recurrence shows that administration of eye drops containing hyaluronic acid 0.3% five times daily for 3 months does not reduce the incidence rate of major symptomatic episodes at 12 months when compared with observation alone (108623).
• Diabetic foot ulcers. Oral hyaluronic acid has only been evaluated in combination with other ingredients; its effect when used alone is unclear. Details: A meta-analysis of results from 4 clinical studies shows that applying hyaluronic acid combination gels or hyaluronic acid-based biomaterials to diabetic foot ulcers increases the odds of complete healing at 12 weeks by about 1.7-fold when compared to control treatment. Forms of hyaluronic acid assessed in the evaluated studies included zinc hyaluronate, hyaluronic acid-based biomaterial (Hyalograft 3D autograft), and a gel containing hyaluronic acid and amino acids (Vulnamin Gel, Errekappa) (91776). It is not clear if the beneficial effects were due to hyaluronic acid or other components of the treatments.
• Exercise-induced muscle soreness. Oral hyaluronic acid has only been evaluated in combination with other ingredients; its effect when used alone is unclear. Details: A very small clinical study in healthy, recreationally active adults shows that a specific product (BioCell Collagen, BioCell Technology, LLC) containing hyaluronic acid 150 mg, chondroitin sulfate 300 mg, and collagen peptides 900 mg, taken twice daily for 6 weeks prior to two bouts of resistance exercise, attenuates muscle damage and decreases delayed-onset muscle soreness when compared with placebo (96301). It is unclear if these effects are due to hyaluronic acid, the other ingredients, or the combination. Furthermore, it should be noted that both studies were funded by the product manufacturer.
• Gastroesophageal reflux disease (GERD). Oral hyaluronic acid has only been evaluated in combination with other ingredients; its effect when used alone is unclear. Details: Patients with non-erosive GERD are thought to be less responsive to conventional acid suppression with proton pump inhibiters (PPIs) and H-2 blockers. A small preliminary clinical study shows that taking a syrup containing hyaluronic acid and chondroitin sulfate along with PPIs, H2-receptor antagonists, and/or antacids, reduces the intensity of symptoms associated with non-erosive GERD by about 3.5-fold when compared with placebo (89592). A larger clinical study in patients with non-erosive GERD shows that taking a different formulation of the same combination of chondroitin sulfate and hyaluronic acid (Esoxx, Alfa Wassermann) 4 times daily for 14 days, in conjunction with a PPI, improves GERD symptom severity by 21%, heartburn by 15%, and regurgitation by 10% when compared with using a PPI and placebo (101271). Hyaluronic acid has also been evaluated in combination with chondroitin sulfate in patients with extraesophageal symptoms of GERD. A small, open-label study shows that taking a specific combination product (Gerdoff, SOFAR S.p.A.) containing hyaluronic acid and chondroitin sulfate three times daily with omeprazole 40 mg daily for 6 weeks increases the rate of treatment response, defined as a 50% or greater improvement in reflux symptoms index scores, by around 40% when compared with omeprazole alone. While average symptom scores were not significantly improved with the combination product over omeprazole, the need for omeprazole as rescue therapy for breakthrough symptoms was reduced in the treatment group (109648). It is unclear if the findings described above are due to hyaluronic acid, chondroitin sulfate, or the combination.
• Gingivitis. It is unclear if hyaluronic acid used in a mouthwash reduces gingivitis severity. Details: A small clinical study in patients with biofilm-induced gingivitis shows that rinsing with 10 mL of hyaluronic acid 0.025% mouth wash (Gengigel, RICERFARMA SRL) for 1 minute twice daily reduces probing index and bleeding when compared with rinsing with a placebo solution, but is less effective when compared with chlorhexidine 0.12% solution (104383). Another small clinical study in patients with plaque-induced gingivitis shows that rinsing with 10 mL of a mouthwash containing hyaluronic acid 0.1% and hydrogen peroxide 1.8% for 30 seconds twice daily for 21 days reduces gingival index scores but not plaque index scores when compared with placebo (110554). It is unclear if these findings are due to hyaluronic acid, hydrogen peroxide, or the combination.
• Intranasal surgery. It is unclear if topical hyaluronic acid irrigation improves recovery in patients after nasal surgery. Details: A small clinical study in patients that underwent nasal surgery for chronic rhinosinusitis shows that performing nasal irrigation with high molecular weight sodium hyaluronate 9 mg twice daily for 6 weeks improves sinus scarring, crusting, and headache when compared with nasal irrigation with saline. However, the sodium hyaluronate irrigation did not improve sinus inflammation or secretions, nasal obstruction, or facial pain (101288).
• Intrauterine adhesions. Several small studies suggest that intrauterine administration of hyaluronic acid gel seems to prevent intrauterine adhesions after uterine surgery. Details: Meta-analyses of 11-12 small clinical studies in patients undergoing uterine surgery shows that intrauterine application of 1-10 mL of hyaluronic acid gel after surgery reduces the risk of intrauterine adhesions by around 50% and increases pregnancy rates when compared with no treatment (110551,110552). One analysis suggests that hyaluronic acid is most effective for prevention of intrauterine adhesions when at least 5 mL of gel is applied (110551).
• Lichen planus. It is unclear if topical hyaluronic acid is beneficial in patients with oral lichen planus. Details: A clinical study in patients with oral lichen planus shows that application of a gel containing hyaluronic acid 0.2% four to five times daily for 28 days reduces soreness in as little as 5 minutes for up to 4 hours when compared with baseline. These findings are numerically similar to those seen with placebo; however, the lack of statistical comparison to placebo limits the validity of this finding (108635). A small clinical study in patients with symptomatic oral lichen planus (including mixed forms) shows that application of a gel containing hyaluronic acid 0.2% three times daily for 4 weeks is similarly effective to triamcinolone for improving pain, erythema, and lesion size (108633). It is unclear if the improvement from baseline differed between groups.
• Melasma. It is unclear if topical hyaluronic acid is beneficial in patients with moderate to severe facial melasma. Details: A small clinical study in patients with mostly mixed-type, moderate to severe facial melasma shows that twice daily application of hyaluronic acid along with isobutylamido thiazolyl resorcinol reduces melasma severity similarly to isobutylamido thiazolyl resorcinol alone (108628). The single-blinded nature of the study limits the validity of these findings.
• Oral mucositis. Topical hyaluronic acid has only been evaluated in combination with other ingredients; its effects when used alone is unclear. Details: A small clinical study in children aged 5 years or older with chemotherapy-induced oral mucositis shows that using a solution containing sodium hyaluronate, verbascoside, and polyvinylpyrrolidone (Mucosyte; Biopharm) three times daily is more effective than placebo for improving pain and other symptoms (97890). Another small clinical study in adults in recovery from hematopoietic stem cell transplantation shows that using a spray product containing sodium hyaluronate with synthetic amino acid precursors of collagen (Mucosamin) attenuates the development of severe oral mucositis when compared with chlorhexidine 0.2% (97889).
• Osteoarthritis. It is unclear if oral hyaluronic acid is beneficial in patients with osteoarthritis of the knee. Details: A small study in patients with knee osteoarthritis shows that taking chicken comb extract (Hyal-Joint, Bioibérica) 80 mg, standardized to contain hyaluronic acid 60% to 70%, once daily for 8 weeks does not reduce pain when compared with placebo (55742). This study was limited by small size and a significant placebo effect. Another small study in patients with knee osteoarthritis shows that taking a different supplement (Oralvisc, Bioibérica) 80 mg standardized to contain hyaluronic acid 70% and glycosaminoglycans once daily for 3 months modestly reduces pain when compared with placebo (91779). Reasons for these differing findings may relate to hyaluronic acid formulation, study funding sources, or the magnitude of placebo effect. Hyaluronic acid has also been studied in combination with chondroitin and collagen peptides (BioCell Collagen, BioCell Technology, LLC) with some evidence of benefit (28680).
• Otitis media. It is unclear if using intranasal hyaluronic acid solution is beneficial for otitis media in children. Details: Preliminary clinical research in children 3-12 years of age who have recurrent or chronic middle ear inflammation and adenoiditis shows that using a compound (Yabro, IBSA Farmaceutici Italia S.r.l.) containing hyaluronic acid in saline intranasally 15 days per month for 3 months modestly reduces the number of patients with impaired otoscopy or middle ear function when compared to baseline (97888). It is unclear if this effect is due to the hyaluronic acid product or to the natural resolution of inflammation over time.
• Radiation dermatitis. It is unclear if topical hyaluronic acid is beneficial for the prevention of radiation dermatitis. Details: A small clinical study in patients with breast cancer undergoing adjuvant radiation therapy following lumpectomy shows that three daily applications of a specific hyaluronic acid gel (RadiaPlex, MPM Medical) to one side of the breast results in a grade 2 or greater dermatitis occurrence rate of 62%, compared with a rate of 48% on the side receiving petrolatum-based gel. A review of a planned interim analysis led to early trial discontinuation (108638).
• Rhinosinusitis. It is unclear if hyaluronic acid solution is beneficial for acute or chronic rhinosinusitis when used in an intranasal saline rinse. Details: A small clinical study in adults with acute rhinosinusitis who are being treated with levofloxacin and prednisone shows that using a 3% hyaluronic acid in saline nasal douche twice daily improves smell, obstruction, and discharge within 14 days when compared with saline alone (97886). A very small clinical study in patients with chronic rhinosinusitis without nasal polyps shows that receiving micronized nasal hyaluronic acid douches twice daily for 30 days improves nasal symptoms, nasal obstruction, and ability to smell to a similar degree as normal saline (104387).
• Sexual dysfunction. It is unclear if vaginal hyaluronic acid is beneficial for improving sexual function in adults with dyspareunia. Details: A small nonrandomized clinical study in females with dyspareunia while taking oral hormonal contraceptives shows that once daily vaginal application of a hyaluronic acid gel for 12 weeks reduces pain and improves sexual function at 12 weeks when compared baseline. Though patients treated with twice weekly vaginal estrogen therapy had better 12-week scores than patients treated with hyaluronic acid, it is unclear if the improvements from baseline differed between groups (108639).
• Tooth extraction. It is unclear if topical hyaluronic acid is beneficial for wound healing after tooth extraction. Details: A small clinical study in patients undergoing tooth extraction shows that application of hyaluronic acid 0.2% gel or hyaluronic acid 0.1% spray to the extraction socket twice daily for 7 days increases the rate of wound closure when compared with no treatment (110553). The validity of these findings is limited by a lack of placebo control group.
• Urinary tract infections (UTIs). Oral and intravesical hyaluronic acid have been evaluated for the prevention of UTI in combination with other ingredients; its effect when used alone is unclear. Details: A meta-analysis of prospective and retrospective studies shows that intravesical administration of 50 mL of specific solutions containing chondroitin sulfate 2% and hyaluronic acid 1.6% (iAluRil, IBSA Farmaceutici; Cystistat, Bioniche), once weekly to once monthly for up to 6 months, reduces the rate of UTI recurrence by about 2-3 incidents per year and delays the time to the first UTI recurrence when compared with placebo or prophylaxis with sulfamethoxazole-trimethoprim (99688). However, the validity of these findings is limited by the low quality and high heterogeneity of the included studies, as well as concerns for publication bias. Also, the effect of hyaluronic acid alone is unclear. Oral hyaluronic acid has also been evaluated in combination with other ingredients for the prevention of recurrent UTI. A small prospective observational study shows that taking 1-2 capsules of a combination of hyaluronic acid, chondroitin sulfate, curcumin, and quercetin daily for 15 days each month, in conjunction with the use of local topical estrogen therapy for up to 12 months, reduces the number of women with recurrent UTIs when compared with taking the oral combination product or the vaginal estrogen product alone (96781). It is unclear if this effect is due to hyaluronic acid, other ingredients, or the combination.
• Vaginal atrophy. It is unclear if topical hyaluronic acid is beneficial for improving symptoms of vaginal atrophy. Details: A small, open-label clinical trial in patients going through menopause with symptoms of vaginal atrophy shows that applying 3 grams of a topical vaginal preparation of hyaluronic acid (Hyalo Gyn, Fidia Farmaceutici) every 3 days for 30 days improves vaginal health scores and reduces vaginal itching, vaginal burning, and pain during intercourse when compared to baseline. However, it does not appear to be any more effective than a polycarbophil vaginal gel (110549). Also, a small observational study in postmenopausal patients with vulvovaginal atrophy has found that applying a topical vaginal preparation containing hyaluronic acid (Justgin, JustPharma) three times weekly for 8 weeks is associated with improved symptoms of vaginal dryness, burning, and itching, as well as pain during intercourse, when compared to baseline (97887). The validity of these findings is limited by the lack of a comparator group and retrospective nature of the study. Some research has evaluated combination products containing hyaluronic acid for vaginal atrophy. A clinical trial in patients with cervical cancer shows that intravaginal administration of a specific suppository (Santes, Lo.Li. Pharma) containing hyaluronic acid, vitamin E, and vitamin A, once daily for the 5 week duration of radiotherapy reduces vaginal dryness, inflammation, and dyspareunia when compared with no additional treatment (101283). Also, a small, open-label clinical study in patients with vaginal atrophy after treatment for breast cancer shows that intravaginal application of a suppository containing hyaluronic acid and extract of aloe, marigold, tiger grass, and tea tree daily for 10 days then every 3 days for 80 days improves vaginal health scores and reduces vaginal dryness and pain during intercourse when compared to baseline, with no difference between the hyaluronic acid-containing suppository and vaginal laser therapy (110550). It is unclear if these findings are due to hyaluronic acid, other ingredients, or the combination.
• Wound healing. Small clinical studies show that topical hyaluronic acid and hyaluronic acid derivatives may improve the healing of various types of wounds. Details: A meta-analysis of small clinical trials suggest that topical hyaluronic acid and hyaluronic acid derivatives might improve the healing of burns, wounds, and skin ulcers when compared with control (104389). More evidence is needed to rate hyaluronic acid for these uses.

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EFFECTIVE

• Hypokalemia. Oral or intravenous potassium can treat and prevent hypokalemia. Details: Administering potassium orally or intravenously is effective for treating and preventing hypokalemia (15,107970). Oral potassium 20 mEq (780 mg of elemental potassium) is typically taken once daily to prevent hypokalemia (15,95010). Oral potassium 40-100 mEq (1560-3900 mg of elemental potassium) is typically taken in 2-5 divided doses daily to treat hypokalemia (95010). Doses should be limited to 40 mEq (1560 mg of elemental potassium), and the total dose should not exceed 200 mEq (7800 mg of elemental potassium) in 24 hours (95010). Potassium supplementation and route of administration should be individualized based on serum potassium level and patient status (15,107970).

LIKELY EFFECTIVE

• Hypertension. Oral potassium, via dietary intake or supplementation, reduces blood pressure. Details: Population research has found that higher dietary potassium consumption is associated with a lower risk of developing hypertension (1310,8817,69512). Additionally, most clinical research shows that potassium, taken orally as part of the diet or as a supplement, reduces systolic blood pressure by about 3-9.5 mmHg and diastolic blood pressure by about 2-6.4 mmHg in patients with or without hypertension (3385,92104,92106,95624,107974). In most of these studies, daily intake of potassium typically ranged from about 1500-7800 mg, with the most common intake being about 2340-2540 mg daily (92104,95624). However, some research shows that taking potassium does not lower systolic or diastolic blood pressure (69541,69550,107966). Differences in the patient populations, potassium intake, and salt intake could have contributed to the conflicting results. Potassium seems to be more effective for people with hypertension, low potassium levels, high daily sodium intake, and for Black adults (3384,3385,3386,92104,92106). Some research also shows that the greatest blood pressure-lowering effects of potassium occur at doses of about 3900-7800 mg daily (95624). A meta-analysis of clinical trials using a novel computational technique to assess both potassium intake and excretion suggests that the optimal blood pressure reduction occurs when taking about 1500 mg supplemental potassium daily or an overall intake of 4500-6500 mg potassium daily (105448). This analysis is limited by the heterogeneity and short duration of the included trials. There is also interest in utilizing low-sodium, high-potassium food substitutes to treat hypertension. Research shows that using salt substitutes containing 25% to 30% potassium chloride reduces systolic and diastolic blood pressure by 3-4.6 mmHg and 1 mmHg, respectively, when compared with regular table salt (107971,107976). In 2017, the American College of Cardiology and the American Heart Association (ACC/AHA) published guidelines recommending that patients with hypertension consume 3500-5000 mg of potassium daily (95680). This intake of potassium is expected to lower systolic blood pressure by about 4-5 mmHg in patients with hypertension and by about 2 mmHg in normotensive patients (3385). Although potassium supplements and dietary potassium both seem to be beneficial, the guidelines recommend getting potassium from dietary sources, since potassium-rich diets are usually heart-healthy (95680). Additionally, the US Food and Drug Administration (FDA) has determined that foods containing at least 350 mg potassium and that are low in sodium, saturated fat, and cholesterol can state that "diets containing foods that are good sources of potassium and low in sodium may reduce the risk of high blood pressure and stroke" (1310,8817).
• Kidney stones (nephrolithiasis). Oral prescription potassium citrate reduces the risk of kidney stone recurrence. It is unclear if non-prescription potassium citrate would be beneficial. Details: The American Urological Association (AUA) recommends potassium citrate therapy for patients with recurrent calcium stones and low urinary citrate, those with recurrent calcium or calcium oxalate stones without current metabolic abnormalities, and those with uric acid or cystine stones. The citrate component reduces urine calcium excretion and increases urine citrate and urine pH, which in turn alleviates crystal growth, formation, and aggregation. Sodium citrate may also be used to prevent stone recurrence; however, due to sodium's propensity to increase urine calcium excretion, potassium citrate remains the preferred salt formulation (107972). It is important to note that potassium citrate supplements are not equivalent to prescription potassium citrate products. Dose and duration of treatment is determined by a healthcare professional and individualized based on a patient's urinary citrate levels (107975,107989). Serum potassium levels should be monitored prior to starting potassium citrate, within 2 weeks of treatment initiation, and every 12 months (107975).

POSSIBLY EFFECTIVE

• Cardiovascular disease (CVD). Eating foods high in potassium and low in sodium might reduce the risk of cardiovascular disease. It is unclear if taking potassium supplements has the same benefit. Details: Large population studies in adults without prior CVD have found that higher dietary potassium intake is associated with a lower risk of cardiovascular events (109395,109399). One study found that daily potassium intake of about 3300 mg is associated with a 13% reduction in CVD risk when compared with intake of about 1920 mg (109399). The other study found that each additional 1000 mg of daily urinary potassium excretion, which is a marker of dietary intake, is associated with an 18% reduction in CVD risk (109395). Another observational study in over 15,000 adults with history of stroke or hypertension shows that replacing regular table salt with a substitute product containing 75% sodium chloride and 25% potassium chloride for an average of 5 years decreases the rate of stroke, major cardiovascular events, or death (107976). High quality clinical trials are needed to confirm this association. The US Food and Drug Administration (FDA) has determined that foods containing at least 350 mg potassium and that are low in sodium, saturated fat, and cholesterol can state that "diets containing foods that are good sources of potassium and low in sodium may reduce the risk of high blood pressure and stroke" (1310,8817).
• Stroke. Eating foods high in potassium and low in sodium might reduce the risk of stroke. It is unclear if taking potassium supplements has the same benefit. Details: Higher dietary intake of potassium seems to be associated with a lower risk of stroke. Population research has found that increasing dietary potassium intake by 1-1.5 grams daily is associated with up to a 20% reduced risk of stroke (92105,92107). Some population research has found that higher supplemental intake of potassium is associated with a 29% reduced risk of ischemic stroke. However, supplemental potassium intake is not found to be associated with a lower risk of hemorrhagic or total stroke (92107). An observational study in over 15,000 adults with history of stroke or hypertension shows that replacing regular table salt with a substitute product containing 75% sodium chloride and 25% potassium chloride for an average of 5 years decreases the rate of stroke, major cardiovascular events, or death (107976). High quality clinical trials are needed to confirm this association. The US Food and Drug Administration (FDA) has determined that foods containing at least 350 mg potassium and that are low in sodium, saturated fat, and cholesterol can state that "diets containing foods that are good sources of potassium and low in sodium may reduce the risk of high blood pressure and stroke" (1310,8817).

INSUFFICIENT RELIABLE EVIDENCE to RATE

• Dental hypersensitivity. It is unclear if topical potassium improves dental hypersensitivity. Details: One meta-analysis of clinical research shows that using a dentifrice containing 5% potassium nitrite reduces dentin sensitivity when compared with a dentifrice that does not contain potassium nitrite (69549). Other clinical research published in a systematic review shows that potassium-containing toothpastes might reduce dentin sensitivity more than controls that do not contain potassium. However, these toothpastes might be less effective than other active toothpastes, such as those containing sodium monofluorophosphate, and the effect may result from a placebo effect, since the mechanism of action of potassium is unclear (69456).
• Diabetes. It is unclear if increasing dietary potassium reduces the risk of diabetes. Details: A meta-analysis of 7 large population studies has found that consuming dietary potassium 3300-3500 mg daily is associated with a 20% reduction in the risk of diabetes when compared with consumption below 1000 mg daily. Results were similar when studies that measured potassium intake with a dietary questionnaire were analyzed separately from those that measured intake based on urinary potassium excretion (110776). However, the validity of this finding is limited by the heterogeneity of the included studies. Furthermore, despite use of data from various databases, most studies included in the analysis were conducted by the same author.
• Impaired glucose tolerance (prediabetes). It is unclear if oral potassium improves glycemic control in prediabetes. Details: A small clinical study in Black patients with prediabetes shows that taking extended-release potassium (Klor-Con M10, Cardinal Health) 40 mEq daily as potassium chloride for 3 months does not improve glucose tolerance when compared with placebo. Although fasting glucose levels were slightly reduced in the potassium group when compared with placebo, both groups experienced a worsening of glucose intolerance, with no change in insulin levels or glycated hemoglobin (98533).
• Osteoporosis. Although there is interest in using oral potassium for osteoporosis, there is insufficient reliable information about the clinical effects of potassium for this condition.
• Physical performance. It is unclear if oral potassium improves physical performance in older adults. Details: Observational research in older adults has found that decreased dietary potassium intake and increased dietary sodium intake over 5 years is associated with worsened physical performance (105450).
• Systemic lupus erythematosus (SLE). It is unclear if oral potassium is beneficial in patients with SLE. Details: Observational research in patients with SLE has found that increased dietary potassium intake is not associated with improvements in disease activity scores or markers of cardiovascular disease, including lipid levels and blood pressure, when compared with low dietary potassium intake. However, higher potassium intake does seem to reduce the odds of having elevated levels of C-reactive protein, a marker of inflammation, in these patients (109397). More evidence is needed to rate potassium for these uses.

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LIKELY SAFE ...when used orally and appropriately. Boron is safe in amounts that do not exceed the tolerable upper intake level (UL) 20 mg daily (7135). ...when used vaginally. Boric acid, the most common form of boron, has been safely used for up to six months (15443,15444,15445,15446,15458,15449,15451,15453,15454). ...when used topically. Boron, in the form of sodium pentaborate pentahydrate 3% gel, has been applied to the skin with apparent safety up to four times daily for up to 5 weeks (95660,109557).

POSSIBLY UNSAFE ...when used orally in doses exceeding the UL of 20 mg daily. Higher doses might adversely affect the testes and male fertility (7135). Poisoning has occurred after ingestion of boron 2.12 grams daily for 3-4 weeks (17). Death has occurred after ingesting a single dose of 30 grams (36848,36863).

CHILDREN: LIKELY SAFE
when used orally and appropriately. Boron is safe in amounts that do not exceed the tolerable upper intake level (UL). The UL by age is 3 mg daily at 1-3 years, 6 mg daily at 4-8 years, 11 mg daily at 9-13 years, and 17 mg daily at 14 years or older (7135). The UL for infants has not been determined (7135).

CHILDREN: POSSIBLY UNSAFE
when used orally in doses exceeding the age-based UL (7135). ...when applied topically in large quantities. Infant deaths have occurred after the use of topical boric acid powder to prevent diaper rash (36873,36874).

PREGNANCY AND LACTATION: LIKELY SAFE
when used orally and appropriately. Boron is safe in amounts that do not exceed the UL during pregnancy or lactation, which is 20 mg daily in those 19-50 years of age or 17 mg daily for those 14-18 years of age (7135).

PREGNANCY AND LACTATION: POSSIBLY UNSAFE
when used orally in doses exceeding the UL. Higher doses might impair growth and cause adverse effects in the developing fetus (7135,102058). ...when used vaginally. Intravaginal boric acid has been associated with a 2.7- to 2.8-fold increased risk of birth defects when used during the first 4 months of pregnancy (15443,15645).

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POSSIBLY SAFE ...when used orally in doses up to 40 mg daily for up to 24 weeks (3111,44446,97238,97239,101717,101718,101744,110732).

PREGNANCY AND LACTATION:
Insufficient reliable information available; avoid using.

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LIKELY SAFE ...when used orally and appropriately. Supplements standardized to contain hyaluronic acid 70%, in an 80 mg daily dose, have been used daily for up to 3 months with no reports of adverse effects (55742,91779). ...when used topically and appropriately. Hyaluronic acid, in a gel or impregnated gauze, has been safely applied to the skin in clinical trials (7889,7892,104389,108627,108640). ...when eye drop preparations containing up to 0.3% hyaluronic acid are used multiple times per day for up to 3 months (97885,97894,97895,110555).

PREGNANCY:
There is insufficient reliable information available about the safety of hyaluronic acid; avoid using.

LACTATION:
There is insufficient reliable information available about the safety of hyaluronic acid. It is not known if hyaluronic acid is excreted in breast milk (7890); avoid using.

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LIKELY SAFE ...when used orally in doses up to 100 mEq total potassium daily, not to exceed 200 mEq in a 24-hour period (95010,107989). Oral potassium chloride and potassium citrate are FDA-approved prescription products (95010,107989). Larger doses increase the risk of hyperkalemia (15). ...when administered intravenously (IV) at appropriate infusion rates (95011). Parenteral potassium is an FDA-approved prescription product (15,95011). A tolerable upper intake level (UL) for potassium has not been established; however, potassium levels should be monitored in individuals at increased risk for hyperkalemia, such as those with kidney disease, heart failure, and adrenal insufficiency (100310,107966).

CHILDREN: LIKELY SAFE
when used orally and appropriately in dietary amounts. A tolerable upper intake level (UL) has not been established for healthy individuals (6243,100310).

PREGNANCY AND LACTATION: LIKELY SAFE
when used orally in dietary amounts of 40-80 mEq daily (15). A tolerable upper intake level (UL) has not been established for healthy individuals (100310).

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ACE INHIBITORS (ACEIs) Interaction Rating = Moderate Be cautious with this combination. Severity = Mild •  Occurrence = Likely •  Level of Evidence = C Using ACEIs with high doses of potassium increases the risk of hyperkalemia.  Details ACEIs block the actions of the renin-angiotensin-aldosterone system and reduce potassium excretion (95628). Concomitant use of these drugs with potassium supplements increases the risk of hyperkalemia (15,23207). However, concomitant use of these drugs with moderate dietary potassium intake (about 3775-5200 mg daily) does not increase serum potassium levels (95628).

ANGIOTENSIN RECEPTOR BLOCKERS (ARBs) Interaction Rating = Moderate Be cautious with this combination. Severity = Mild •  Occurrence = Likely •  Level of Evidence = C Using ARBs with high doses of potassium increases the risk of hyperkalemia.  Details ARBs block the actions of the renin-angiotensin-aldosterone system and reduce potassium excretion (95628). Concomitant use of these drugs with potassium supplements increases the risk of hyperkalemia (15,23207). However, concomitant use of these drugs with moderate dietary potassium intake (about 3775-5200 mg daily) does not increase serum potassium levels (95628).

POTASSIUM-SPARING DIURETICS Interaction Rating = Moderate Be cautious with this combination. Severity = Mild •  Occurrence = Likely •  Level of Evidence = C Concomitant use increases the risk of hyperkalemia.  Details Using potassium-sparing diuretics with potassium supplements increases the risk of hyperkalemia (15).

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General ...Orally, boron is generally well tolerated when used in doses below the tolerable upper intake level (UL) of 20 mg. Vaginally, boron is well tolerated.
Most Common Adverse Effects:
Orally: Anorexia, dermatitis, erythema, indigestion.
Vaginally: Burning and pain.

Dermatologic ...Orally, chronic use of 1 gram daily of boric acid or 25 grams daily of boric tartrate can cause dermatitis and alopecia (7135).
Larger doses can result in acute poisoning. Symptoms of poisoning in adults and children may include skin erythema, desquamation, and exfoliation (17).

Gastrointestinal ...Orally, chronic use of 1 gram daily of boric acid or 25 grams daily of boric tartrate can cause anorexia and indigestion (7135).
Larger doses can result in acute poisoning. Children who have ingested 5 grams or more of borates can have persistent nausea, vomiting, and diarrhea leading to acute dehydration, shock, and coma. Adults who have ingested 15-20 grams of borate can exhibit nausea, vomiting, diarrhea, epigastric pain, hematemesis, and a blue-green discoloration of feces and vomit (17).

Genitourinary ...Vaginally, boric acid can cause vulvovaginal burning and dyspareunia in males if intercourse occurs shortly after vaginal treatment (15447).

Neurologic/CNS ...Orally, large doses can result in acute poisoning. Poisoning with boron can cause hyperexcitability, irritability, tremors, convulsions, weakness, lethargy, and headaches (17).

Ocular/Otic ...Exposure to boric acid or boron oxide dust has been reported to cause eye irritation (36852).

Pulmonary/Respiratory ...Exposure to boric acid and boron oxide dust has been reported to cause mouth and nasal passage irritation, sore throat, and productive cough (36852).

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General ...Orally, collagen type II seems to be well tolerated.
Most Common Adverse Effects:
Orally: Abdominal pain, constipation, nausea, and vomiting.

Cardiovascular ...Orally, one incident of mild hypertension was reported as being possibly related to collagen type II in a clinical trial of children (101719).

Dermatologic ...Orally, collagen type II might cause itching. In two cases, the itching was associated with skin eruption (44451,101717,101719).

Gastrointestinal ...Orally, the most common adverse effects of collagen type II reported in clinical studies are gastrointestinal and include constipation, nausea, vomiting, and abdominal pain. These occurred in up to 7% of patients taking collagen type II (44451,97238,97239,101717,101719). Anorexia was also reported, but this was much less common (44451).

Hematologic ...Orally, one incident each of blood in urine and a decrease in white blood cell count were reported for patients taking collagen type II in clinical research (101717).

Hepatic ...Orally, liver function abnormalities, including elevated transaminase levels, have been reported in some clinical research, but this is uncommon (3111,44451,101717).

Neurologic/CNS ...Orally, headache, dizziness, and insomnia have been reported for patients taking collagen type II in clinical studies, but these events are uncommon (44451,97238,97239,101717).

Renal ...Orally, one case of mild proteinuria was reported as being possibly related to use of collagen type II in a clinical trial of children (101719).

Other ...Orally, edema occurred in two patients taking collagen type II in clinical research (101717).

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General ...Orally and topically, hyaluronic acid appears to be well tolerated.
Most Common Adverse Effects:
Topically: Eczema, erythema, itching, wound hemorrhage, wound infection (e.g., erysipelas).

Dermatologic ...The use of needle-free devices to inject hyaluronic acid for cosmetic purposes has been reported to cause serious injury, and in some cases permanent harm, to the skin, lips, and eyes (108613).
Topically, hyaluronic acid application has been reported to cause eczema, erythema, itching, wound hemorrhage, and wound infection (e.g., erysipelas) (108628,108640).

Ocular/Otic ...Ocular pain has been reported rarely in patients using eye drops containing up to 0. 3% hyaluronic acid (97885).

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General ...Orally or intravenously, potassium is generally well-tolerated.
Most Common Adverse Effects:
Orally: Abdominal pain, belching, diarrhea, flatulence, nausea, and vomiting.
Serious Adverse Effects (Rare):
All ROAs: High potassium levels can cause arrhythmia, heart block, hypotension, and mental confusion.

Cardiovascular ...Orally or intravenously, high potassium levels can cause hypotension, cardiac arrhythmias, heart block, or cardiac arrest (15,16,3385,95011,95626,95630).

Gastrointestinal ...Orally or intravenously, high doses of potassium can cause, nausea, vomiting, abdominal pain, diarrhea, and flatulence (95010,95011). Bleeding duodenal ulcers have also been associated with ingestion of slow-release potassium tablets (69625,69672).

Neurologic/CNS ...Orally or intravenously, high potassium levels can cause paresthesia, generalized weakness, flaccid paralysis, listlessness, vertigo, or mental confusion (15,16,3385,95011).

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