Each capsule contains: Bacterial Culture 3 Billion: Lactobacillus acidophilus , Lactobacillus rhamnosus , Streptococcus thermophilus , Lactococcus lactis , Bifidobacterium breve , Bifidobacterium longum , Bifidobacterium longum , Pediococcus Acidilactici , Lactobacillus bulgaricus • Ascorbic Acid (vitamin C). Other Ingredients: Maltodextrin, Gelatin (capsule), Fructooligosaccharide (fruit sugar), Magnesium Stearate.
Brand name products often contain multiple ingredients. To read detailed information about each ingredient, click on the link for the individual ingredient shown above.
Below is general information about the effectiveness of the known ingredients contained in the product Super Dophilus Acidophilus. Some ingredients may not be listed. This information does NOT represent a recommendation for or a test of this specific product as a whole.
INSUFFICIENT RELIABLE EVIDENCE to RATE
INSUFFICIENT RELIABLE EVIDENCE to RATE
INSUFFICIENT RELIABLE EVIDENCE to RATE
INSUFFICIENT RELIABLE EVIDENCE to RATE
INSUFFICIENT RELIABLE EVIDENCE to RATE
Below is general information about the safety of the known ingredients contained in the product Super Dophilus Acidophilus. Some ingredients may not be listed. This information does NOT represent a recommendation for or a test of this specific product as a whole.
LIKELY SAFE ...when used orally and appropriately. Bifidobacterium lactis has been safely used alone or in combination with other probiotics in clinical trials lasting up to 12 weeks (92255,98502,105158,107572,107581,107586,110979,110985,110986,110992)(110993,110998,110999).
CHILDREN: LIKELY SAFE
when used orally and appropriately in children of most ages.
Bifidobacterium lactis has been safely used alone or in combination with other probiotics in infants and children for up to 15 months (3169,3458,92265,95381,95382,98736,105149,107582,107583,107585)(107587,107590,110984,110987,110988,110991,110994,110995). A combination probiotic containing B. lactis and Lactobacillus acidophilus (HOWARU Protect, Danisco) has been used safely for up to 6 months in children aged 3-5 years (16847). A specific combination of B. lactis, Bifidobacterium bifidum, and L. acidophilus (Complete Probiotic Platinum) has also been used safely for up to 18 months in children aged 4 months to 5 years (103436). In addition, in children ages 4-17 years, 1 billion CFUs of a 1:1:1 combination of B. lactis CECT 8145, Lacticasebacillus casei CECT 9104, and Bifidobacterium longum CECT 7347 has been used safely for 12 weeks (107531). There is insufficient reliable information available about the safety of B. lactis in preterm infants with a birth weight under 1000 grams. Cases of bacteremia have occurred rarely in preterm infants given other probiotics (102416,111610,111612,111613,111850,111852,111853). The US Food and Drug Administration (FDA) has issued a warning about cases of serious infections caused by probiotics reported in very preterm or very low birth weight infants under 1000 grams (111610). Similarly, the American Academy of Pediatrics does not support the routine administration of probiotics to these infants due to conflicting data on safety and efficacy (111608).
PREGNANCY AND LACTATION:
Insufficient reliable information available.
A meta-analysis of four clinical trials shows that taking probiotics during pregnancy increases the relative risk of pre-eclampsia by 85% when compared with placebo. Although the specific effects of Bifidobacterium lactis are unclear from this analysis, three of the included studies used B. lactis in combination with Lacticaseibacillus rhamnosus (105185). More information is needed to determine if certain patients are at increased risk.
LIKELY SAFE ...when used orally and appropriately. Bifidobacterium breve has been safely used alone or in combination with other probiotics in clinical trials lasting up to one year (3261,6087,11379,12769,12775,14338,14370,14371,103447,111002)(111003,111005).
CHILDREN: LIKELY SAFE
when used orally and appropriately in children of most ages.
Bifidobacterium breve has been safely used alone or in combination with other probiotics in infants and children for up to 12 months (17726,35377,92256,103449,105150,105151,107497,107598,111001)(111004,111008,111015). Cases of bacteremia have occurred rarely in children (107597). There is insufficient reliable information available about the safety of B. breve in preterm infants with a birth weight under 1000 grams. Cases of bacteremia have occurred rarely in preterm infants given B. breve or other probiotics (102416,111610,111612,111613,111850,111852,111853). The US Food and Drug Administration (FDA) has issued a warning about cases of serious infections caused by probiotics reported in very preterm or very low birth weight infants under 1000 grams (111610). Similarly, the American Academy of Pediatrics does not support the routine administration of probiotics to these infants due to conflicting data on safety and efficacy (111608).
PREGNANCY AND LACTATION:
There is insufficient reliable information available about the safety of Bifidobacterium breve during pregnancy or lactation.
However, there are currently no reasons to expect safety concerns when used appropriately.
LIKELY SAFE ...when used orally and appropriately. Lactobacillus acidophilus has been safely used as part of multi-ingredient probiotic products in studies lasting up to nine months (1731,6087,14370,14371,90231,90296,92255,103438,12775,107581)(110950,110970,110979,110998,111785,111793). ...when used intravaginally and appropriately. L. acidophilus has been used safely in studies lasting up to 12 weeks (12108,13176,13177,90265). There is insufficient reliable information available about the safety of non-viable, heat-killed L. acidophilus formulations when used orally.
CHILDREN: LIKELY SAFE
when used orally and appropriately in children of most ages.
Lactobacillus acidophilus has been safely used for up to 5 days (96887). Also, combination probiotics containing L. acidophilus have been used with apparent safety in various doses and durations. L. acidophilus has been combined with Bifidobacterium animalis (HOWARU Protect, Danisco) for up to 6 months in children 3-5 years old (16847), with Bifidobacterium bifidum for 6 weeks (90602,96890), with Bifidobacterium bifidum and Bifidobacterium animalis subsp. lactis (Complete Probiotic Platinum) for 18 months in children 4 months to 5 years of age (103436), and in a specific product (Visbiome, ExeGi Pharma) containing a total of 8 species for 3 months in children 2-12 years old (107497). There is insufficient reliable information available about the safety of L. acidophilus in preterm infants with a birth weight under 1000 grams. Cases of bacteremia have occurred rarely in preterm infants given other probiotics (102416,111610,111612,111613,111850,111852,111853). The US Food and Drug Administration (FDA) has issued a warning about cases of serious infections caused by probiotics reported in very preterm or very low birth weight infants under 1000 grams (111610). Similarly, the American Academy of Pediatrics does not support the routine administration of probiotics to these infants due to conflicting data on safety and efficacy (111608).
PREGNANCY: POSSIBLY SAFE
when used orally and appropriately.
A combination of Lactobacillus acidophilus, Lacticaseibacillus casei, and Bifidobacterium bifidum has been used with apparent safety for 6 weeks, starting at 24-28 weeks' gestation (95416,98430).
LACTATION:
There is insufficient reliable information available about the safety of Lactobacillus acidophilus during lactation.
However, there are currently no reasons to expect safety concerns when used appropriately.
POSSIBLY SAFE ...when used orally. In the United States, most yogurt is made via bacterial fermentation with Lactobacillus delbrueckii subsp. bulgaricus and Streptococcus thermophilus (12778). Probiotic species similar to L. delbrueckii have not been associated with serious safety concerns when used appropriately in healthy adults. Most clinical trials have used L. delbrueckii in combination with other probiotics. It is unclear which specific dose and duration of use for L. delbrueckii as a probiotic may be most appropriate.
CHILDREN:
There is insufficient reliable information available about the safety of Lactobacillus delbrueckii as a probiotic in children of any age.
Cases of bacteremia have occurred rarely in preterm infants given other probiotics (102416,111610,111612,111613,111850,111852,111853). The US Food and Drug Administration (FDA) has issued a warning about cases of serious infections caused by probiotics reported in very preterm or very low birth weight infants under 1000 grams (111610). Similarly, the American Academy of Pediatrics does not support the routine administration of probiotics to these infants due to conflicting data on safety and efficacy (111608).
PREGNANCY AND LACTATION:
There is insufficient reliable information available about the safety of Lactobacillus delbrueckii during pregnancy and lactation.
However, there are currently no reasons to expect safety concerns when used appropriately.
LIKELY SAFE ...when used orally, topically, intramuscularly, or intravenously and appropriately. Vitamin C is safe when taken orally in doses below the tolerable upper intake level (UL). Tell patients not to exceed the UL of 2000 mg daily (1959,4713,4714,4844). ...when used intravenously or intramuscularly and appropriately. Injectable vitamin C is an FDA-approved prescription product (15).
POSSIBLY UNSAFE ...when used orally in excessive doses. Doses greater than the tolerable upper intake level (UL) of 2000 mg daily can significantly increase the risk of adverse effects such as osmotic diarrhea and gastrointestinal upset (4844).
CHILDREN: LIKELY SAFE
when used orally and appropriately (4844,10352,14443).
CHILDREN: POSSIBLY UNSAFE
when used orally in excessive amounts.
Tell patients not to use doses above the tolerable upper intake level (UL) of 400 mg daily for children ages 1 to 3 years, 650 mg daily for children 4 to 8 years, 1200 mg daily for children 9 to 13 years, and 1800 mg daily for adolescents 14 to 18 years. Higher doses can cause osmotic diarrhea and gastrointestinal upset (4844).
PREGNANCY AND LACTATION: LIKELY SAFE
when used orally and appropriately (4844).
PREGNANCY AND LACTATION: POSSIBLY UNSAFE
when used orally in excessive doses.
Tell patients over age 19 not to use doses exceeding the UL of 2000 mg daily when pregnant or breast-feeding and for those 14-18 years of age not to use doses exceeding 1800 mg daily when pregnant or breast-feeding. Higher doses can cause osmotic diarrhea and gastrointestinal upset. Large doses of vitamin C during pregnancy can also cause newborn scurvy (4844); avoid using.
Below is general information about the interactions of the known ingredients contained in the product Super Dophilus Acidophilus. Some ingredients may not be listed. This information does NOT represent a recommendation for or a test of this specific product as a whole.
Theoretically, taking Bifidobacterium lactis with antibiotic drugs might decrease the effectiveness of B. lactis.
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Theoretically, taking Bifidobacterium breve with antibiotic drugs might decrease the effectiveness of B. breve.
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Theoretically, taking Lactobacillus acidophilus with antibiotic drugs might decrease the effectiveness of L. acidophilus.
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L. acidophilus preparations usually contain live and active organisms. Therefore, simultaneously taking antibiotics might kill a significant number of the organisms (1740). Tell patients to separate administration of antibiotics and L. acidophilus preparations by at least two hours.
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Theoretically, taking Lactobacillus delbrueckii with antibiotic drugs might decrease the effectiveness of L. delbrueckii.
Details
Lactobacillus delbrueckii preparations usually contain live and active organisms. Therefore, simultaneously taking antibiotics might kill a significant number of the organisms (1740). Tell patients to separate administration of antibiotics and L. delbrueckii preparations by at least two hours.
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High-dose vitamin C might slightly prolong the clearance of acetaminophen.
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A small pharmacokinetic study in healthy volunteers shows that taking high-dose vitamin C (3 grams) 1.5 hours after taking acetaminophen 1 gram slightly increases the apparent half-life of acetaminophen from around 2.3 hours to 3.1 hours. Ascorbic acid competitively inhibits sulfate conjugation of acetaminophen. However, to compensate, elimination of acetaminophen glucuronide and unconjugated acetaminophen increases (6451). This effect is not likely to be clinically significant.
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Theoretically, antioxidant effects of vitamin C might reduce the effectiveness of alkylating agents.
Details
The use of antioxidants like vitamin C during chemotherapy is controversial. There is concern that antioxidants could reduce the activity of chemotherapy drugs that generate free radicals, such as cyclophosphamide, chlorambucil, carmustine, busulfan, and thiotepa (391). In contrast, some researchers theorize that antioxidants might make chemotherapy more effective by reducing oxidative stress that could interfere with apoptosis (cell death) of cancer cells (14012,14013). More evidence is needed to determine what effect, if any, antioxidants such as vitamin C have on chemotherapy.
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Vitamin C can increase the amount of aluminum absorbed from aluminum compounds.
Details
Research in animals and humans shows that vitamin C increases aluminum absorption, theoretically by chelating aluminum and keeping it in solution where it is available for absorption (10549,10550,10551,21556). In people with normal renal function, urinary excretion of aluminum will likely increase, making aluminum retention and toxicity unlikely (10549). Patients with renal failure who take aluminum-containing compounds such as phosphate binders should avoid vitamin C supplements in doses above the recommended dietary allowances.
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Theoretically, the antioxidant effects of vitamin C might reduce the effectiveness of antitumor antibiotics.
Details
The use of antioxidants like vitamin C during chemotherapy is controversial. There is concern that antioxidants could reduce the activity of chemotherapy drugs which generate free radicals, such as doxorubicin (391). In contrast, some researchers theorize that antioxidants might make chemotherapy more effective by reducing oxidative stress that could interfere with apoptosis (cell death) of cancer cells (14012,14013). More evidence is needed to determine what effects, if any, antioxidants such as vitamin C have on chemotherapy.
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Acidification of the urine by vitamin C might increase aspirin levels.
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It has been suggested that acidification of the urine by vitamin C could increase reabsorption of salicylates by the renal tubules, and increase plasma salicylate levels (3046). However, short-term use of up to 6 grams daily of vitamin C does not seem to affect urinary pH or salicylate excretion (10588,10589), suggesting this interaction is not clinically significant.
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Acidification of the urine by vitamin C might increase choline magnesium trisalicylate levels.
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It has been suggested that acidification of the urine by vitamin C could increase reabsorption of salicylates by the renal tubules, and increase plasma salicylate levels (3046,4531). However, short-term use of up to 6 grams daily of vitamin C does not seem to affect urinary pH or salicylate excretion (10588,10589), suggesting this interaction probably is not clinically significant.
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Vitamin C might increase blood levels of estrogens.
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Increases in plasma estrogen levels of up to 55% occur under some circumstances when vitamin C is taken concurrently with oral contraceptives or hormone replacement therapy, including topical products (129,130,11161). It is suggested that vitamin C prevents oxidation of estrogen in the tissues, regenerates oxidized estrogen, and reduces sulfate conjugation of estrogen in the gut wall (129,11161). When tissue levels of vitamin C are high, these processes are already maximized and supplemental vitamin C does not have any effect on estrogen levels. Increases in plasma estrogen levels may occur when patients who are deficient in vitamin C take supplements (11161). Monitor these patients for estrogen-related side effects.
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Theoretically, vitamin C might decrease levels of fluphenazine.
Details
In one patient there was a clinically significant decrease in fluphenazine levels when vitamin C (500 mg twice daily) was started (11017). The mechanism is not known, and there is no further data to confirm this interaction.
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Vitamin C can modestly reduce indinavir levels.
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One pharmacokinetic study shows that taking vitamin C 1 gram orally once daily along with indinavir 800 mg orally three times daily reduces the area under the concentration-time curve of indinavir by 14%. The mechanism of this interaction is unknown, but it is unlikely to be clinically significant in most patients. The effect of higher doses of vitamin C on indinavir levels is unknown (11300,93578).
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Vitamin C can increase levothyroxine absorption.
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Two clinical studies in adults with poorly controlled hypothyroidism show that swallowing levothyroxine with a glass of water containing vitamin C 500-1000 mg in solution reduces thyroid stimulating hormone (TSH) levels and increases thyroxine (T4) levels when compared with taking levothyroxine alone. This suggests that vitamin C increases the oral absorption of levothyroxine, possibly due to a reduction in pH (102978).
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Vitamin C might decrease the beneficial effects of niacin on high-density lipoprotein (HDL) cholesterol levels.
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A combination of niacin and simvastatin (Zocor) effectively raises HDL cholesterol levels in patients with coronary disease and low HDL levels. Clinical research shows that taking a combination of antioxidants (vitamin C, vitamin E, beta-carotene, and selenium) along with niacin and simvastatin (Zocor) attenuates this rise in HDL, specifically the HDL-2 and apolipoprotein A1 fractions, by more than 50% in patients with coronary disease (7388,11537). It is not known whether this adverse effect is due to a single antioxidant such as vitamin C, or to the combination. It also is not known whether it will occur in other patient populations.
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Acidification of the urine by vitamin C might increase salsalate levels.
Details
It has been suggested that acidification of the urine by vitamin C could increase reabsorption of salicylates by the renal tubules, and increase plasma salicylate levels (3046). However, short-term use of up to 6 grams/day vitamin C does not seem to affect urinary pH or salicylate excretion (10588,10589), suggesting this interaction probably is not clinically significant.
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High-dose vitamin C might reduce the levels and effectiveness of warfarin.
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Vitamin C in high doses may cause diarrhea and possibly reduce warfarin absorption (11566). There are reports of two people who took up to 16 grams daily of vitamin C and had a reduction in prothrombin time (9804,9806). Lower doses of 5-10 grams daily can also reduce warfarin absorption. In many cases, this does not seem to be clinically significant (9805,9806,11566,11567). However, a case of warfarin resistance has been reported for a patient who took vitamin C 500 mg twice daily. Cessation of vitamin C supplementation resulted in a rapid increase in international normalized ratio (INR) (90942). Tell patients taking warfarin to avoid taking vitamin C in excessively high doses (greater than 10 grams daily). Lower doses may be safe, but the anticoagulation activity of warfarin should be monitored. Patients who are stabilized on warfarin while taking vitamin C should avoid adjusting vitamin C dosage to prevent the possibility of warfarin resistance.
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Below is general information about the adverse effects of the known ingredients contained in the product Super Dophilus Acidophilus. Some ingredients may not be listed. This information does NOT represent a recommendation for or a test of this specific product as a whole.
General
...Orally, Bifidobacterium lactis seems to be well tolerated by most patients.
Most Common Adverse Effects:
Orally: Diarrhea.
Serious Adverse Effects (Rare):
Orally: There is concern that probiotics may cause infections in some people.
Dermatologic ...In clinical research, two cases of rash, one with itching, were reported by patients taking a combination of Bifidobacterium lactis BB-12, Lacticaseibacillus paracasei F19, and Lactobacillus acidophilus La5. However, it is not clear if these adverse effects were due to B. lactis, other probiotics, or the combination, or if the events were idiosyncratic (90236).
Gastrointestinal ...Bloating and flatulence have been reported with probiotic use; however, these adverse effects have not been reported from ingestion of Bifidobacterium lactis in particular. When taken orally, B. lactis can cause diarrhea and other gastrointestinal complaints in children (3169,95381,105149). Gastrointestinal complaints including worsening diarrhea, abdominal pain, constipation, stomach burn, and flatulence have been reported rarely (110986,110999).
Immunologic
...There have been cases of Bifidobacterium bacteremia in critically ill patients (102416,107599).
These cases are rare and none seem to be due to Bifidobacterium lactis alone.
A specific preparation (NBL probiotic ATP, Nobel) containing B. lactis, Lacticaseibacillus casei, Lacticaseibacillus rhamnosus, Lactiplantibacillus plantarum, fructo-oligosaccharides, galacto-oligosaccharides, colostrum, and lactoferrin was found to be a significant risk factor for vancomycin-resistant Enterococcus colonization in premature infants. Although there was no direct link to determine causation, it was hypothesized that the probiotic mixture helped to mediate the acquisition and transfer of antibiotic resistance genes (96890).
General
...Orally, Bifidobacterium breve seems to be well tolerated by most patients.
Serious Adverse Effects (Rare):
Orally: There is concern that B. breve may cause bacteremia in certain patients.
Gastrointestinal ...Bloating and flatulence have been reported with probiotic use; however, these adverse effects have not been reported from ingestion of Bifidobacterium breve in particular.
Immunologic
...There have been rare cases of Bifidobacterium bacteremia related to probiotic use in critically ill infants and adults (102416,107597,107599).
In addition, cases of B. breve bacteremia have occurred in preterm infants or young children using probiotics (102416,107597). In a review of 298 term and preterm infants who were admitted to the neonatal intensive care unit of a hospital in Japan and received B. breve BBG-01 over a five-year period, bacteremia occurred in six patients (2%). Concomitant conditions included gastrointestinal perforation, food-induced enterocolitis syndrome, adhesive ileus, ileal volvulus, and aspiration pneumonia following esophageal atresia repair (107597). In one case report, B. breve BBG-01 was provided to an infant starting two days after birth and the day of surgery for an omphalocele. The infant also had bilious gastric fluid with elevated inflammatory markers. It is thought that the intestinal surgical repair might have led to the translocation of the ingested B. breve (107596).
Some cases of B. breve bacteremia do not seem to be directly related to probiotic use. There have been rare cases of B. breve bacteremia and necrotizing fasciitis in patients with type 2 diabetes. One patient had pre-existing chronic diabetic foot ulcers and the other had abscesses near the groin (111007,111011). A childhood history of frequent consumption of fermented beverages containing B. breve was thought to have resulted in B. breve in the intestinal flora of one of these patients, aged 42 years (111011). However, it is unclear if consumption of an unknown quantity of B. breve more than 20 years previously would play a role in this outcome. There is also a rare case of ventriculoperitoneal shunt B. breve infection possibly related to poor oral hygiene and dentition (111014).
General
...Orally and intravaginally, Lactobacillus acidophilus is generally well tolerated.
Most Common Adverse Effects:
Orally: Mild gastrointestinal adverse effects.
Intravaginally: Vaginal discharge.
Serious Adverse Effects (Rare):
Orally: There is concern that L. acidophilus may cause infections in some people.
Dermatologic ...Orally, in one clinical trial, a combination of Lactobacillus acidophilus La-5, Lacticaseibacillus paracasei subsp. paracasei F19, and Bifidobacterium animalis subsp. lacltis BB-12 was associated with two cases of rash, one with itching. However, it is not clear if these adverse effects were due to L. acidophilus, other ingredients, the combination, or if the events were idiosyncratic (90236).
Gastrointestinal ...Orally, taking Lactobacillus acidophilus in combination with other probiotics may cause gastrointestinal side effects including epigastric discomfort (90239), abdominal pain (90239,90291,111785), dyspepsia (90239), flatulence (107497,107520), bloating (107497,111785), diarrhea (111785), vomiting (107537), and burping (90239); however, these events are uncommon.
Genitourinary ...Intravaginally, cream containing Lactobacillus acidophilus has been shown to cause increased vaginal discharge in about 5% of patients, compared to about 1% of patients receiving placebo cream (90237). Vaginal burning was reported by one person using intravaginal L. acidophilus and Limosilactobacillus fermentum in a clinical trial (111781).
Immunologic ...Since Lactobacillus acidophilus preparations contain live and active microorganisms, there is some concern that they might cause pathogenic infection in some patients. L. acidophilus has been isolated in some cases of bacteremia, sepsis, splenic abscess, liver abscess, endocarditis, necrotizing fasciitis, pancreatic necrosis, and meningoencephalitis. Most of these cases are thought to be due to the translocation of bacteria from other locations in the body in which they occur naturally, such as the oral cavity and gastrointestinal tract (107543,111782,111792). L. acidophilus endophthalmitis has been reported rarely (111787,111795). In one case, it was related to intravitreal injections for age-related macular degeneration in a 90-year-old female with an intraocular lens (111787). In another, it occurred following cataract surgery (111795).
General
...Orally, Lactobacillus delbrueckii seems to be well tolerated.
Serious Adverse Effects (Rare):
Orally: There is concern that Lactobacillus delbrueckii may cause infections in some people.
Immunologic
...Since Lactobacillus delbrueckii preparations contain live and active microorganisms, there is some concern that they might cause pathogenic infection in some patients.
Some lactobacilli species have been isolated in cases of bacteremia, sepsis, splenic abscess, endocarditis, necrotizing fasciitis, pancreatic necrosis, and meningoencephalitis. These cases are thought to be due to the translocation of bacteria from other locations in the body in which they occur naturally, such as the oral cavity, or the gastrointestinal or urogenital tract, and not to dietary or supplemental intake (107543,110917,110918,110920,110921).
There are various cases of L. delbrueckii urinary tract infections (UTI) (112553,112557,112558). In one case, a L. delbrueckii UTI occurred in an 82-year-old male with benign prostate hyperplasia and related urinary retention (112553). Any use of probiotic products containing L. delbrueckii was not mentioned in this report. In one case, a 49-year-old male with a L. delbrueckii UTI reported daily yogurt intake, possibly fermented with L. delbrueckii. He had urinary retention in the absence of benign prostate hypertrophy and initially presented with acute bacterial prostatitis (112557). Most cases of UTIs have occurred in older females. An 85-year-old female with recurrent UTIs denied probiotic use; however, exposure via ingested foods was possible (112558).
General
...Orally, intravenously, and topically, vitamin C is well-tolerated.
Most Common Adverse Effects:
Orally: Abdominal cramps, esophagitis, heartburn, headache, osmotic diarrhea, nausea, vomiting. Kidney stones have been reported in those prone to kidney stones. Adverse effects are more likely to occur at doses above the tolerable upper intake level of 2 grams daily.
Topically: Irritation and tingling.
Serious Adverse Effects (Rare):
Orally: There have been rare case reports of carotid inner wall thickening after large doses of vitamin C.
Intravenously: There have been case reports of hyperoxalosis and oxalate nephropathy following high-dose infusions of vitamin C.
Cardiovascular
...Evidence from population research has found that high doses of supplemental vitamin C might not be safe for some people.
In postmenopausal adults with diabetes, supplemental vitamin C intake in doses greater than 300 mg per day is associated with increased risk of cardiovascular mortality. However, dietary intake of vitamin C is not associated with this risk. Also, vitamin C intake is not associated with an increased risk of cardiovascular mortality in patients without diabetes (12498).
Oral supplementation with vitamin C has also been associated with an increased rate of carotid inner wall thickening in men. There is preliminary evidence that supplemental intake of vitamin C 500 mg daily for 18 months can cause a 2.5-fold increased rate of carotid inner wall thickening in non-smoking men and a 5-fold increased rate in men who smoked. The men in this study were 40-60 years old (1355). This effect was not associated with vitamin C from dietary sources (1355).
There is also some concern that vitamin C may increase the risk of hypertension in some patients. A meta-analysis of clinical research suggests that, in pregnant patients at risk of pre-eclampsia, oral intake of vitamin C along with vitamin E increases the risk of gestational hypertension (83450). Other clinical research shows that oral intake of vitamin C along with grape seed polyphenols can increase both systolic and diastolic blood pressure in hypertensive patients (13162).
Dental ...Orally, vitamin C, particularly chewable tablets, has been associated with dental erosion (83484).
Dermatologic ...Topically, vitamin C might cause tingling or irritation at the site of application (6166). A liquid containing vitamin C 20%, red raspberry leaf cell culture extract 0.0005%, and vitamin E 1% (Antioxidant and Collagen Booster Serum, Max Biocare Pty Ltd.) has been reported to cause mild tingling and skin tightness (102355). It is unclear if these effects are due to vitamin C, the other ingredients, or the combination.
Gastrointestinal ...Orally, the adverse effects of vitamin C are dose-related and include nausea, vomiting, esophagitis, heartburn, abdominal cramps, gastrointestinal obstruction, and diarrhea. Doses greater than the tolerable upper intake level (UL) of 2000 mg per day can increase the risk of adverse effects such as osmotic diarrhea and severe gastrointestinal upset (3042,4844,96707,104450). Mineral forms of vitamin C, such as calcium ascorbate (Ester-C), seem to cause fewer gastrointestinal adverse effects than regular vitamin C (83358). In a case report, high dose intravenous vitamin C was associated with increased thirst (96709).
Genitourinary ...Orally, vitamin C may cause precipitation of urate, oxalate, or cysteine stones or drugs in the urinary tract (10356). Hyperoxaluria, hyperuricosuria, hematuria, and crystalluria have occurred in people taking 1 gram or more per day (3042,90943). Supplemental vitamin C over 250 mg daily has been associated with higher risk for kidney stones in males. There was no clear association found in females, but the analysis might not have been adequately powered to evaluate this outcome (104029). In people with a history of oxalate kidney stones, supplemental vitamin C 1 gram per day appears to increase kidney stone risk by 40% (12653). A case of hematuria, high urine oxalate excretion, and the presence of a ureteral stone has been reported for a 9-year-old male who had taken about 3 grams of vitamin C daily since 3 years of age. The condition resolved with cessation of vitamin C intake (90936).
Hematologic ...Prolonged use of large amounts of vitamin C can result in increased metabolism of vitamin C; subsequent reduction in vitamin C intake may precipitate the development of scurvy (15). In one case, a patient with septic shock and a large intraperitoneal hematoma developed moderate hemolysis and increased methemoglobin 12 hours after a high-dose vitamin C infusion. The patient received a blood transfusion and the hemolysis resolved spontaneously over 48 hours (112479).
Neurologic/CNS ...Orally, the adverse effects of vitamin C are dose-related and include fatigue, headache, insomnia, and sleepiness (3042,4844,83475,83476).
Renal ...Hyperoxalosis and oxalate nephropathy have been reported following high-dose infusions of vitamin C. Hyperoxalosis and acute kidney failure contributed to the death of a 76-year-old patient with metastatic adenocarcinoma of the lung who received 10 courses of intravenous infusions containing vitamins, including vitamin C and other supplements over a period of 1 month. Dosages of vitamin C were not specified but were presumed to be high-dose (106618). In another case, a 34-year-old patient with a history of kidney transplant and cerebral palsy was found unresponsive during outpatient treatment for a respiratory tract infection. The patient was intubated for acute hypoxemic respiratory failure, initiated on vasopressors, hydrocortisone, and antibacterial therapy, and received 16 doses of vitamin C 1.5 grams. Serum creatinine level peaked at greater than 3 times baseline and the patient required hemodialysis for oliguria and uncontrolled acidosis. Kidney biopsy revealed oxalate nephropathy with concomitant drug-induced interstitial nephritis (106625). In another case, a 41-year-old patient with a history of kidney transplant presented with fever, nausea, and decreased urine output 4 days after receiving intravenous vitamin C 7 grams for urothelial carcinoma. Serum creatinine levels increased from 1.7 mg/dL to 7.3 mg/dL over those 4 days, and hemodialysis was initiated 3 days after admission due to anuria. Renal biopsy confirmed the diagnosis of acute oxalate nephropathy (109962).
Other ...Intravenously, hypernatremia and falsely elevated ketone levels is reported in a patient with septic shock and chronic kidney disease after a high-dose vitamin C infusion. The hypernatremia resolved over 24 hours after cessation of the infusion (112479).
