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INSUFFICIENT RELIABLE EVIDENCE to RATE

• Amenorrhea. Although there has been interest in using oral cassia cinnamon for amenorrhea, there is insufficient reliable information about the clinical effects of cassia cinnamon for this purpose.
• Angina. Although there has been interest in using oral cassia cinnamon for angina, there is insufficient reliable information about the clinical effects of cassia cinnamon for this purpose.
• Common cold. Although there has been interest in using oral cassia cinnamon for the common cold, there is insufficient reliable information about the clinical effects of cassia cinnamon for this purpose.
• Diabetes. Several clinical trials have evaluated oral cassia cinnamon for type 2 diabetes, but results are conflicting. Details: Some clinical studies and meta-analyses of cassia cinnamon have found significant benefits in patients with diabetes (11347,17011,21914,21918,89646,89649,111692), while others have not (14344,16010,17689,21915,21916,89650). Results from meta-analyses are also mixed with respect to lowering fasting blood glucose and lipid levels (89647,108264). Meta-analyses including more than 1500 adults with type 2 diabetes show that taking cassia cinnamon 120 mg To 14.4 grams daily for 4-18 weeks reduces fasting blood glucose by an average of 25 mg/dL, total cholesterol by 16 mg/dL, low-density lipoprotein (LDL) cholesterol by 9 mg/dL, and triglycerides by 30 mg/dL, and increases high-density lipoprotein (HDL) cholesterol by 2 mg/dL (89647,111692). Analyses included studies examining either extract or powder, and two of the studies included used an unspecified type of cinnamon. In contrast, a more recent meta-analysis of studies limited to cassia cinnamon ground bark powder 1-2 grams daily for 40-90 days shows no benefit on fasting blood glucose or lipid levels (108264). Evidence regarding cassia cinnamon's effect on glycated hemoglobin (HbA1c) is mixed, with one meta-analysis of 15 clinical studies suggesting that it moderately lowers HbA1c, while other studies suggest that it does not, although some of the studies were too short to detect a change (89647,108264,111692). One meta-analysis found that cassia cinnamon was most beneficial for adults with HbA1c of 8% or higher (111692). The individual studies included in the meta-analyses were also small, and very heterogenous in relation to dose, duration, use of conventional medications, and diabetes control at baseline (89647,108264). Cassia cinnamon has also been evaluated in combination with other ingredients. A study in treatment-naïve adults newly diagnosed with type 2 diabetes shows that taking a combination product containing cassia cinnamon extract 100 mg, black seed extract, and ficin extract (NW Low-Glu) 4-5 times daily for 12 weeks reduces HbA1c by 0.6-0.8% and 2-hour postprandial glucose by 25-35 mg/dl when compared to baseline, with similar findings when compared with metformin. However, there were no notable differences in fasting blood glucose, insulin resistance, and beta cell function (111710). It is unclear if these effects are due to cassia cinnamon, other ingredients, or the combination. In patients with type 1 diabetes, clinical research shows that taking cassia cinnamon daily does not improve fasting blood glucose, HbA1c, insulin sensitivity, or the rate of hypoglycemic episodes (16010,89648).
• Diarrhea. It is unclear if oral cassia cinnamon is beneficial for diarrhea. Details: A moderate-sized clinical study in adults with diarrhea shows that taking cinnamon water extract 1200 mg twice daily for 8 weeks increases colonic transit time by about 10 hours but does not improve other symptoms of diarrhea including percentage of bowel movements with diarrhea, Bristol stool scale score, abdominal pain, bowel urgency, or abdominal distension when compared with placebo (111712).
• Dyslipidemia. It is unclear if oral cassia cinnamon is beneficial for dyslipidemia. Details: A meta-analysis of 12 clinical studies in adults with metabolic syndrome, polycystic ovary syndrome (PCOS), nonalcoholic fatty liver disease (NAFLD), type 2 diabetes, prediabetes, and overweight or obesity shows that taking cassia cinnamon daily for 2-4 months reduces total cholesterol by 7 mg/dL, triglycerides by 9 mg/dL, and low-density lipoprotein (LDL) cholesterol by 6 mg/dL but does not increase high-density lipoprotein (HDL) cholesterol. Subgroup analysis suggests that cassia cinnamon improves lipid profiles of Asian patients but not European or American patients. Additionally, higher doses appear to regulate lipid profiles better, and cassia cinnamon doses above 1.5 grams daily increase high-density lipoprotein cholesterol by about 2.5 mg/dL. Subgroup analysis also shows that cassia cinnamon only reduces triglycerides for patients with metabolic syndrome and increases HDL cholesterol for patients with PCOS but does not impact total cholesterol for those with type 2 diabetes (111709).
• Erectile dysfunction (ED). Although there has been interest in using oral cassia cinnamon for ED, there is insufficient reliable information about the clinical effects of cassia cinnamon for this purpose.
• Hypertension. Although there has been interest in using oral cassia cinnamon for hypertension, there is insufficient reliable information about the clinical effects of cassia cinnamon for this purpose.
• Impaired glucose tolerance (prediabetes). The effects of cassia cinnamon in patients with impaired glucose tolerance are unclear; results from clinical research are conflicting. Details: A small clinical study in patients with impaired glucose tolerance shows that taking cassia cinnamon powder 6 grams twice daily for 12 weeks does not improve fasting plasma glucose or insulin sensitivity when compared with placebo (96280). However, another clinical study in overweight or obese patients with impaired fasting blood glucose shows that taking a dried aqueous extract of cassia cinnamon 250 mg twice daily for 12 weeks reduces fasting blood glucose by about 12 mg/dL when compared with baseline, but does not affect fasting insulin levels (93118). Another preliminary clinical trial in overweight or obese patients with impaired glucose tolerance shows that taking two capsules of a specific combination product, (Glycabiane, PiLeJe) containing cassia cinnamon extract 228 mg, chromium chloride 10 mcg, and carnosine 100 mg per capsule, daily for 4 months decreases fasting blood glucose by 6.5 mg/dL but has no effect on glycated hemoglobin (HbA1c), insulin sensitivity, or body weight, when compared with placebo (94234). It is unclear whether these effects are due to cassia cinnamon, ingredients, or the combination.
• Mosquito repellent. It is unclear if topical cassia cinnamon is beneficial as a mosquito repellent. Details: Preliminary clinical research suggests that applying a cream containing cassia cinnamon oil 5% to the skin provides protection from mosquito bites. However, the repellency of this cream appears to decrease more quickly over time compared to MeiMei cream (containing citronella and geranium oils) and Repellan S aerosol (containing 19% N,N-diethyl-m-toluamide (DEET)) (59580).
• Muscle cramps. Although there has been interest in using oral cassia cinnamon for muscle cramps, there is insufficient reliable information about the clinical effects of cassia cinnamon for this purpose.
• Nausea and vomiting. Although there has been interest in using oral cassia cinnamon for nausea and vomiting, there is insufficient reliable information about the clinical effects of cassia cinnamon for this purpose.
• Obesity. It is unclear if oral cassia cinnamon is beneficial for weight loss. Details: A meta-analysis of 7 clinical studies shows that cassia cinnamon reduces body mass index (BMI) when compared with placebo (111692). However, preliminary clinical research in a small number of patients with overweight or obesity and impaired glucose tolerance shows that taking two capsules of a specific combination product (Glycabiane, PiLeJe) containing cassia cinnamon extract 228 mg, chromium chloride 10 mcg, and carnosine 100 mg per capsule, daily for 4 months does not decrease body weight, BMI, fat mass, or lipid levels when compared with placebo (94234). A very small clinical study in healthy adults shows that drinking a single dose of cinnamon infusion containing 2 grams of powdered cinnamon served along with breakfast does not increase energy expenditure, diet-induced thermogenesis, respiratory quotient, or lipid and carbohydrate oxidation and does not affect appetite responses including hunger, fullness, desire to eat, macronutrient intake, and food intake throughout the day when compared with control. Furthermore, cassia cinnamon intake reduces feelings of satiety and increases energy intake in the first meal after the intervention when compared with control (111707). The validity of these findings is limited by a lack of blinding.
• Polycystic ovary syndrome (PCOS). It is unclear if oral cassia cinnamon is beneficial for patients with PCOS. Details: A small observational study in adults with PCOS suggests that taking cinnamon 500 mg three times daily for 8 weeks is associated with decreased body weight, body mass index, insulin resistance, and testosterone but does not appear to alter levels of luteinizing hormone, follicle-stimulating hormone, dehydroepiandrosterone (DHEA), insulin, or lipids when compared with placebo (113514).
• Stroke. It is unclear if oral cassia cinnamon is beneficial for stroke prevention. Details: Preliminary clinical research in patients with a mild ischemic stroke or transient ischemic attack shows that taking cinnamon (Chinese herbal formula granules, Guangdong Yifang Pharmaceutical Co, Ltd) 5 grams with aspirin 100 mg daily for 90 days, starting within 24 hours of the ischemia, reduces the percentage of patients with a recurrent stroke to 3%, compared with 15% of those taking aspirin plus placebo. There were also modest improvements in levels of plasma lipids, glucose, and glycated hemoglobin, as well as a reduced likelihood of identifying unstable or severe plaques on carotid ultrasound (108265). The use of cassia cinnamon, specifically, was not confirmed; however, this species of cinnamon is commonly used in traditional Chinese medicine, as indicated in the study.
• Urinary incontinence. Although there has been interest in using oral cassia cinnamon for urinary incontinence, there is insufficient reliable information about the clinical effects of cassia cinnamon for this purpose. More evidence is needed to rate cassia cinnamon for these uses.

(Read more about CASSIA CINNAMON)

INSUFFICIENT RELIABLE EVIDENCE to RATE

• Age-related macular degeneration (AMD). It is unclear if oral goji berry reduces the risk of developing AMD. Details: A small, unblinded clinical study in healthy adults aged 45 to 65 years shows that consuming goji berries 28 grams five times a week for 90 days improves macular pigment optical density, which is a marker for AMD, when compared to baseline (110767). The validity of this finding is limited by the lack of statistical comparison to the other study group that received a supplement containing lutein and zeaxanthin.
• Cancer. Although there is interest in using oral goji for cancer, there is insufficient reliable information about the clinical effects of goji for this condition.
• Cardiovascular disease (CVD). It is unclear if oral goji improves risk factors for CVD. Details: A meta-analysis of 6 mostly small clinical studies of adults in China shows that consuming goji as polysaccharide extract or juice for 1-3 months modestly improves triglycerides, low-density lipoprotein (LDL) cholesterol, high-density lipoprotein (HDL) cholesterol, and fasting blood glucose but does not impact total cholesterol when compared with no treatment or placebo (110765). Another meta-analysis of 4 small clinical studies in adults also shows that consuming goji polysaccharide extract or goji berries for 1-4 months modestly improves triglycerides and HDL but does not impact total or LDL cholesterol when compared with placebo or healthy eating. Goji also had no impact on systolic or diastolic blood pressure, or markers of oxidative stress (110768). However, the interpretation of the findings from these meta-analyses is limited by the use of variable goji forms and doses, as well as inclusion of studies in heterogeneous patients, including healthy people, patients with diabetes, and patients with metabolic syndrome. Furthermore, most studies were conducted in China; it is unclear if these benefits can be extrapolated to other geographic locations.
• Cognitive function. It is unclear if oral goji berry improves cognition in healthy young individuals. Details: A small clinical crossover study in healthy participants 14-24 years of age shows that taking goji berry fruit water extract (BIOMIX Company) 3600 mg in 3 divided doses daily for 4 weeks might improve certain cognitive measures such as verbal learning, short-term memory, and attention when compared with baseline (105488). The validity of these findings are limited due to incomplete outcome reporting and a lack of statistical comparisons between the treatment and placebo groups.
• Cough. Although there is interest in using oral goji for cough, there is insufficient reliable information about the clinical effects of goji for this purpose.
• Depression. It is unclear if oral goji berry polysaccharide is beneficial for adolescents with subthreshold depression. Details: A small clinical study in adolescents aged approximately 15 years with subthreshold depression in China shows that taking goji berry polysaccharide extract 300 mg daily for 6 weeks modestly improves clinician-assessed depression scores (i.e. Hamilton Depression Scale, HAMD-24) but does not improve self-reported depression scores (i.e. Beck Depression Inventory) or scores assessing sleep quality, psychological distress, or anxiety when compared with placebo (110769). However, these results are from an interim analysis, which limits the interpretation of these findings. Furthermore, it is unclear if results can be extrapolated to patients in other geographic locations.
• Diabetes. It is unclear if oral goji berry polysaccharides improve glycemic control in patients with diabetes. Details: One small clinical study in patients with type 2 diabetes shows that taking goji fruit polysaccharide powder 150 mg twice daily for 3 months results in a slightly lower postprandial glucose area under the curve (AUC), but does not seem to affect insulin levels or insulin resistance, when compared with placebo. A subgroup of patients who were not taking antidiabetes medications had a greater reduction in postprandial blood glucose (92117).
• Dry eye. Although there is interest in using oral goji for dry eye, there is insufficient reliable information about the clinical effects of goji for this purpose.
• Erectile dysfunction (ED). Although there is interest in using oral goji for ED, there is insufficient reliable information about the clinical effects of goji for this condition.
• Hypertension. Although there is interest in using oral goji root bark for hypertension, there is insufficient reliable information about the clinical effects of goji for this condition.
• Obesity. It is unclear if oral goji berry juice improves weight loss. Details: Preliminary clinical research in healthy, overweight adults shows that drinking a specific goji fruit juice (GoChi, FreeLife International LLC) 120 mL daily for 14 days while following a weight loss diet and participating in an exercise program decreases waist circumference by about 4.7 cm more than exercise and diet alone. However, drinking goji berry juice along with diet and exercise does not improve body weight, body mass index, or body fat when compared with diet and exercise alone (52536).
• Quality of life. Small clinical studies suggest that oral goji berry juice may modestly improve quality of life in healthy adults. Details: Small clinical studies in healthy adults suggest that taking a specific standardized goji fruit juice (GoChi, FreeLife International LLC) 120 mL daily for 14-30 days improves subjective measures of energy levels, athletic performance, sleep quality, mental acuity, calmness, feelings of well-being, and gastrointestinal regularity when compared with placebo (17082,52532,52542). These studies were funded by the juice manufacturer.
• Sunburn. It is unclear if oral goji extract can prevent sunburn. Details: A small clinical study in healthy Japanese adults shows that taking goji extract 900 mg daily for 8 weeks reduces and accelerates resolution of erythema after exposure to a standard dose of UVB irradiation when compared with placebo (110770). All study participants were highly UV-sensitive; it is unclear whether these results can be extrapolated to individuals less sensitive to UV irradiation.
• Tinnitus. Although there is interest in using oral goji for tinnitus, there is insufficient reliable information about the clinical effects of goji for this purpose. More evidence is needed to rate goji for these uses.

(Read more about GOJI)

INSUFFICIENT RELIABLE EVIDENCE to RATE

• Bronchitis. Although there is interest in using oral horny goat weed for bronchitis, there is insufficient reliable information about the clinical effects of horny goat weed for this condition.
• Coronary heart disease (CHD). Although there is interest in using oral horny goat weed for CHD, there is insufficient reliable information about the clinical effects of horny goat weed for this condition.
• Erectile dysfunction (ED). Although there is interest in using oral horny goat weed for ED, there is insufficient reliable information about the clinical effects of horny goat weed for this condition.
• Fatigue. Although there is interest in using oral horny goat weed for fatigue, there is insufficient reliable information about the clinical effects of horny goat weed for this condition.
• Gulf war syndrome. It is unclear if oral horny goat weed is beneficial in patients with Gulf war syndrome. Details: A small clinical study in males with Gulf war syndrome shows that taking horny goat weed extract 250 mg or 500 mg twice daily, standardized to contain 50 mg or 100 mg of icariin per dose, respectively, for 30 days does not improve symptoms of Gulf war syndrome when compared with placebo (108311).
• Hepatitis. Although there is interest in using oral horny goat weed for hepatitis, there is insufficient reliable information about the clinical effects of horny goat weed for this condition.
• HIV/AIDS. Although there is interest in using oral horny goat weed for HIV/AIDS, there is insufficient reliable information about the clinical effects of horny goat weed for this condition.
• Hypertension. Although there is interest in using oral horny goat weed for hypertension, there is insufficient reliable information about the clinical effects of horny goat weed for this condition.
• Male infertility. Although there is interest in using oral horny goat weed for male infertility, there is insufficient reliable information about the clinical effects of horny goat weed for this condition.
• Memory. Although there is interest in using oral horny goat weed for memory, there is insufficient reliable information about the clinical effects of horny goat weed for this purpose.
• Myocarditis. Although there is interest in using oral horny goat weed for myocarditis, there is insufficient reliable information about the clinical effects of horny goat weed for this condition.
• Osteoarthritis. Although there is interest in using oral horny goat weed for osteoarthritis, there is insufficient reliable information about the clinical effects of horny goat weed for this condition.
• Osteoporosis. Several small, low-quality clinical studies suggest that horny goat weed may modestly improve bone mineral density (BMD) in patients with osteoporosis. Details: A meta-analysis of 12 small, low-quality clinical studies in patients with osteoporosis shows that taking horny goat weed alone or in combination with conventional therapy improves BMD when compared with a control group. When added to conventional therapy, horny goat weed appears to have a large effect on BMD, while its effect is more modest when used alone. The most common formulations and doses used include granules 1 gram twice daily for 6 months, an extract 600 mg taken in divided doses daily for 6 months, and a decoction 50 mL taken 2-3 times daily for 3-6 months. The pooled analysis suggests that horny goat weed decoctions are more effective than other formulations (109578). Additionally, a small clinical study in postmenopausal patients not included in the analysis above shows that taking a specific extract of horny goat weed containing 60 mg icariin, 15 mg daidzein, and 3 mg genistein (Xianling Gubao; Tong Ji Tang Pharmacal Company) daily, in addition to calcium 300 mg daily, for 24 months attenuates loss of BMD of the lumbar spine and femoral neck when compared with placebo plus calcium. BMD increased by 1.6% and 1.3% at each site, respectively, compared with decreases of 1.8% and 2.4%, respectively, with placebo (14900).
• Postmenopausal conditions. It is unclear if oral horny goat weed is beneficial in patients with postmenopausal conditions. Details: Preliminary clinical research in postmenopausal patients shows that taking horny goat weed water extract 300 mL daily for 6 months slightly decreases triglyceride and total cholesterol levels and can increase estradiol levels when compared with placebo (55452). The clinical significance of these effects is unclear.
• Sexual dysfunction. Although there is interest in using oral horny goat weed for sexual dysfunction, there is insufficient reliable information about the clinical effects of horny goat weed for this condition. More evidence is needed to rate horny goat weed for these uses.

(Read more about HORNY GOAT WEED)

POSSIBLY INEFFECTIVE

• Menopausal symptoms. Topical wild yam does not seem to improve menopausal symptoms. Details: Wild yam applied topically as a cream in menopausal patients for 3 months appears to be no better than placebo for relieving vasomotor symptoms, such as hot flashes and night sweats. It also does not appear to change serum follicle stimulating hormone (FSH), estradiol, or progesterone levels (10989).

INSUFFICIENT RELIABLE EVIDENCE to RATE

• Cognitive function. It is unclear if oral wild yam is beneficial for improving cognitive function in healthy adults. Details: Preliminary clinical research in healthy adults shows that taking a specific wild yam extract (Diopower 15, Anti-Aging Pro Corporation) orally, 50 mg (containing diosgenin 8 mg) daily for 12 weeks, modestly improves overall measures of cognitive function and semantic fluency when compared with placebo (96724).
• Dysmenorrhea. Although there is interest in using oral or topical wild yam for dysmenorrhea, there is insufficient reliable information about the clinical effects of wild yam for this condition.
• Gallbladder disease. Although there is interest in using oral wild yam for gallbladder disease, there is insufficient reliable information about the clinical effects of wild yam for this condition.
• Infertility. Although there is interest in using oral or topical wild yam for infertility, there is insufficient reliable information about the clinical effects of wild yam for this condition.
• Osteoporosis. Although there is interest in using oral wild yam for osteoporosis, there is insufficient reliable information about the clinical effects of wild yam for this condition.
• Postmenopausal conditions. Although there is interest in using oral wild yam for postmenopausal conditions, there is insufficient reliable information about the clinical effects of wild yam for these conditions.
• Premenstrual syndrome (PMS). Although there is interest in using oral wild yam for PMS, there is insufficient reliable information about the clinical effects of wild yam for this condition.
• Rheumatoid arthritis (RA). Although there is interest in using oral wild yam for RA, there is insufficient reliable information about the clinical effects of wild yam for this condition.
• Sexual dysfunction. Although there is interest in using oral wild yam for sexual dysfunction, there is insufficient reliable information about the clinical effects of wild yam for this condition. More evidence is needed to rate wild yam for these uses.

(Read more about WILD YAM)

INSUFFICIENT RELIABLE EVIDENCE to RATE

• Aging skin. Although there has been interest in using topical zizyphus for aging skin, there is insufficient reliable information about the clinical effects of zizyphus for this purpose.
• Anemia of chronic disease. Although there has been interest in using oral zizyphus for anemia of chronic disease, there is insufficient reliable information about the clinical effects of zizyphus for this purpose.
• Anxiety. Although there has been interest in using oral zizyphus for anxiety, there is insufficient reliable information about the clinical effects of zizyphus for this purpose.
• Asthma. Although there has been interest in using oral zizyphus for asthma, there is insufficient reliable information about the clinical effects of zizyphus for this purpose.
• Athletic performance. Although there has been interest in using oral zizyphus to improve athletic performance, there is insufficient reliable information about the clinical effects of zizyphus for this purpose.
• Cancer. Although there has been interest in using oral zizyphus for cancer, there is insufficient reliable information about the clinical effects of zizyphus for this purpose.
• Constipation. It is unclear if oral zizyphus fruit extract is beneficial in patients with constipation. Details: A small clinical study in patients with idiopathic constipation shows that taking zizyphus fruit extract 20-40 drops daily for 12 weeks improves bloating, abdominal pain, difficult evacuation, and quality of life when compared to baseline. Significant improvements in constipation-related symptoms were lacking in patient taking placebo drops (93316). The validity of these findings is limited by the lack of statistical comparison between groups.
• Coronavirus disease 2019 (COVID-19). Oral zizyphus has only been evaluated in combination with other ingredients; its effect when used alone is unclear. Details: A small clinical study in adults hospitalized with confirmed COVID-19 shows that taking a combination product containing zizyphus, barley, and Assyrian plum 200 mL twice daily for 5 days in addition to standard therapy improves oxygen saturation levels and fatigue but does not improve cough severity or frequency, respiratory rate, or temperature when compared with control (112818). It is unclear if these effects are due to zizyphus, other ingredients, or the combination. It is also unclear if these changes are due to the product or the natural resolution of the condition.
• Diabetes. It is unclear if oral zizyphus fruit powder is beneficial in patients with type 2 diabetes. Details: A small clinical study in patients with type 2 diabetes shows that taking zizyphus fruit powder 30 grams daily for 12 weeks reduces measures of insulin resistance and improves measures of insulin sensitivity, but does not affect fasting blood glucose levels or glycated hemoglobin, when compared with placebo (104507).
• Diarrhea. Although there has been interest in using oral zizyphus for diarrhea, there is insufficient reliable information about the clinical effects of zizyphus for this purpose.
• Epilepsy. Although there has been interest in using oral zizyphus for epilepsy, there is insufficient reliable information about the clinical effects of zizyphus for this purpose.
• Hyperlipidemia. It is unclear if oral zizyphus fruit powder is beneficial in patients with hyperlipidemia. Details: A small clinical study in obese adolescents with hyperlipidemia shows that taking zizyphus fruit powder 5 grams three times daily for one month modestly lowers total cholesterol and low-density lipoprotein (LDL) cholesterol, but does not improve high-density lipoprotein (HDL) cholesterol, when compared with placebo (93317). However, a small clinical study in patients with type 2 diabetes shows that taking zizyphus fruit powder 30 grams daily for 12 weeks does not improve lipid levels when compared with placebo (104507).
• Hypertension. Although there has been interest in using oral zizyphus for hypertension, there is insufficient reliable information about the clinical effects of zizyphus for this purpose.
• Insomnia. It is unclear if oral zizyphus seed extract is beneficial in patients with insomnia. Details: A very small crossover trial in patients with chronic insomnia shows that taking zizyphus seed extract 2 grams one hour before bedtime for 4 weeks improves sleep quality as measured using the Pittsburgh Sleep Quality Index, but not when assessed on the Insomnia Severity Index, when compared with placebo. While patients self-reported significant improvements in total sleep time, sleep efficiency, and sleep onset latency with zizyphus, these findings were not consistent with data gathered from actigraphy wrist watches worn during the study (107921). Zizyphus has also been evaluated in combination with other ingredients. A clinical trial in healthy adults with mild insomnia shows that taking a specific product (LZ Complex3, Sanofi) containing zizyphus 4.5 grams, hops 500 mg, lactium 75 mg, magnesium oxide 52.5 mg, and vitamin B6 10 mg daily for 2 weeks does not improve sleep quality, daytime functioning, or physical fatigue when compared with placebo (95971). Liver disease. Although there has been interest in using oral zizyphus for liver disease, there is insufficient reliable information about the clinical effects of zizyphus for this purpose.
• Melasma. Oral zizyphus has only been evaluated in combination with other ingredients; its effect when used alone is unclear. Details: A small clinical study in adults with hyperpigmentation of facial skin shows that taking a syrup containing extracts of zizyphus and several other herbal plants 7.5 mL twice daily for 8 weeks reduces the number of pigments, total area of pigmentation, and percentage area of pigmentation when compared with baseline and placebo (112816). However, it is unclear if these changes are clinically significant. In addition, it is unclear if these effects are due to zizyphus, other ingredients, or the combination.
• Neonatal jaundice. It is unclear if oral zizyphus fruit extract is beneficial for neonatal jaundice. Details: A small clinical study in hospitalized infants with jaundice who are also being treated with phototherapy shows that giving zizyphus fruit extract 1 mL/kg orally three times daily does not significantly reduce levels of bilirubin, but modestly reduces the duration of hospitalization by 0.2 days, when compared with placebo (93306).
• Peptic ulcers. Although there has been interest in using oral zizyphus for peptic ulcers, there is insufficient reliable information about the clinical effects of zizyphus for this purpose.
• Wound healing. Although there has been interest in using topical zizyphus for wound healing, there is insufficient reliable information about the clinical effects of zizyphus for this purpose. More evidence is needed to rate zizyphus for these uses.

(Read more about ZIZYPHUS)

LIKELY SAFE ...when consumed in amounts commonly found in foods. Cassia cinnamon has Generally Recognized As Safe (GRAS) status in the US for use as a spice or flavoring agent (4912) ...when used orally and appropriately, short-term. Cassia cinnamon 1-2 grams daily has been used safely for up to 3 months (17011,21914). Cassia cinnamon 3-6 grams daily has been used safely for up to 6 weeks (11347,14344). Cassia cinnamon extract corresponding to 3 grams daily of cassia cinnamon powder has also been used safely for up to 4 months (21916).

POSSIBLY SAFE ...when used topically, short-term. Cassia cinnamon oil 5% cream applied topically to the legs has been used safely in one clinical trial (59580).

POSSIBLY UNSAFE ...when used orally in high doses, long-term. Some cassia cinnamon products contain high levels of coumarin. Coumarin can cause hepatotoxicity in animal models (15299,21920). In humans, very high doses of coumarin from 50-7000 mg daily can result in hepatotoxicity that resolves when coumarin use is discontinued (15302). In most cases, ingestion of cassia cinnamon will not provide a high enough amount of coumarin to cause significant toxicity; however, in especially sensitive people, such as those with liver disease, prolonged ingestion of large amounts of cassia cinnamon might exacerbate the condition.

CHILDREN: POSSIBLY SAFE
when used orally and appropriately, short-term. Cassia cinnamon 1 gram daily has been used safely in adolescents 13-18 years of age for up to 3 months (89648).

PREGNANCY AND LACTATION: LIKELY SAFE
when consumed in amounts commonly found in foods (4912). There is insufficient reliable information available about the safety of cassia cinnamon when used in medicinal amounts during pregnancy and breast-feeding. Stay on the safe side and stick to food amounts.

(Read more about CASSIA CINNAMON)

POSSIBLY SAFE ...when goji fruit preparations are used orally and appropriately, short-term. Goji berry whole fruit, boiled or steamed, has been used with apparent safety at a dose of 15 grams daily for 16 weeks (105489). Other goji berry products have also been used with apparent safety in clinical research, including a specific goji fruit juice (GoChi, FreeLife International) 120 mL daily for 30 days (52532), a goji fruit polysaccharide 300 mg daily for 3 months (92117), and a specific milk-based formulation of goji berry (Lacto-Wolfberry, Nestlé Research Center) for 3 months (52539). There has been some concern about the atropine content of goji; however, most analyses show that levels of atropine in goji berries from China and Thailand are far below potentially toxic levels (52524,94667). There is insufficient reliable information available about the safety of oral use of other parts of the goji plant.

PREGNANCY AND LACTATION:
Insufficient reliable information available. Some animal research shows that goji fruit may stimulate the uterus (12). However, this has not been reported in humans. Until more is known, avoid using during pregnancy or lactation.

(Read more about GOJI)

POSSIBLY SAFE ...when horny goat weed extract is used orally and appropriately, short-term. A specific extract of horny goat weed containing 60 mg icariin, 15 mg daidzein, and 3 mg genistein (Xianling Gubao; Tong Ji Tang Pharmacal Company) has been used daily with apparent safety for up to 24 months (14900,97268). Another aqueous extract of horny goat weed containing up to 25.36% icariin has been used in a dose of 300 mL daily with apparent safety for up to 6 months (55452). Another horny goat weed extract has been used with apparent safety at doses up to 1000 mg daily (providing 200 mg icariin) for up to 30 days (108311).

POSSIBLY UNSAFE ...when used orally long-term or in high doses. Long-term use, or taking high doses of some species of horny goat weed, has been linked to serious adverse effects including respiratory arrest (10346).

PREGNANCY: POSSIBLY UNSAFE
when used orally. Horny goat weed might have androgenic activity (10346). Theoretically, it might harm a developing fetus; avoid using.

LACTATION:
Insufficient reliable information available; avoid using.

(Read more about HORNY GOAT WEED)

POSSIBLY SAFE ...when used orally. A dose of 50 mg (containing 8 mg diosgenin) has been used with apparent safety for 12 weeks (12,96724). ...when used topically. A wild yam cream has been used with apparent safety for 3 months (10989).

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

(Read more about WILD YAM)

LIKELY SAFE ...when zizyphus fruit is consumed in the amounts typically found in foods.

POSSIBLY SAFE ...when zizyphus fruit or seed is used orally and appropriately, short-term. Zizyphus fruit powder has been used with apparent safety at doses up to 30 grams daily for up to 12 weeks (93317,104507). Zizyphus fruit extract has been used with apparent safety at a dose of 20-40 drops daily for up to 12 weeks (93316). Zizyphus seed extract has been used with apparent safety at a dose of 2 grams daily for 4 weeks (107921). There is insufficient reliable information available about the safety of zizyphus when used topically.

PREGNANCY AND LACTATION: LIKELY SAFE
when zizyphus fruit is consumed in the amounts typically found in foods. There is insufficient reliable information available about the safety of zizyphus fruit in amounts greater than those found in foods; avoid using.

(Read more about ZIZYPHUS)

ANTIDIABETES DRUGS Interaction Rating = Moderate Be cautious with this combination. Severity = Moderate •  Occurrence = Possible •  Level of Evidence = B Theoretically, cassia cinnamon may have additive effects with antidiabetes drugs.  Details Cassia cinnamon may lower blood glucose levels, and have additive effects in patients treated with antidiabetic agents (11347,17011,21914,21918,89649). Dose adjustments to diabetes medications might be necessary.

HEPATOTOXIC DRUGS Interaction Rating = Moderate Be cautious with this combination. Severity = High •  Occurrence = Possible •  Level of Evidence = D Theoretically, large doses of cassia cinnamon might cause additive effects when used with hepatotoxic drugs.  Details There is some concern that ingesting large amounts of cassia cinnamon for an extended duration might cause hepatotoxicity in some people. Cassia cinnamon contains coumarin, which can cause hepatotoxicity in animal models (15299,21920). In humans, very high doses of coumarin from 50-7000 mg/day can result in hepatotoxicity that resolves when coumarin use is discontinued (15302,97249). Lower amounts might also cause liver problems in sensitive people, such as those with liver disease or those taking potentially hepatotoxic agents.

(Read more about CASSIA CINNAMON)

ANTIDIABETES DRUGS Interaction Rating = Minor Be watchful with this combination. Severity = Mild •  Occurrence = Possible •  Level of Evidence = B Theoretically, concomitant use of goji fruit polysaccharides or goji root bark with antidiabetes drugs might have additive effects.  Details Animal and in vitro research show that goji root bark and fruit polysaccharides might have hypoglycemic effects (7126,92118,94667). However, clinical research has only shown that taking goji fruit polysaccharides with or without antidiabetes drugs modestly reduces postprandial glucose when compared with control, with no reports of hypoglycemia (92117).

ANTIHYPERTENSIVE DRUGS Interaction Rating = Moderate Be cautious with this combination. Severity = Moderate •  Occurrence = Possible •  Level of Evidence = D Theoretically, concomitant use of goji root bark, but not goji fruit, with antihypertensive drugs might have additive effects.  Details Animal and in vitro research suggest that goji root bark has hypotensive effects (7126,94667). However, goji fruit juice does not appear to reduce systolic or diastolic blood pressure in humans (17082).

CYTOCHROME P450 2C19 (CYP2C19) SUBSTRATES Interaction Rating = Moderate Be cautious with this combination. Severity = Moderate •  Occurrence = Possible •  Level of Evidence = D Theoretically, goji berry might inhibit CYP2C19 and reduce metabolism of CYP2C19 substrates.  Details In vitro research shows that goji berry tincture and juice inhibit CYP2C19 enzymes (105486). Concomitant use with goji may decrease metabolism and increase levels of CYP2C19 substrates. However, this has not been reported in humans.

CYTOCHROME P450 2C9 (CYP2C9) SUBSTRATES Interaction Rating = Moderate Be cautious with this combination. Severity = Moderate •  Occurrence = Possible •  Level of Evidence = D Theoretically, goji berry might inhibit CYP2C9 and reduce metabolism of CYP2C9 substrates.  Details In vitro research shows that goji berry tincture and juice inhibit CYP2C9 enzymes (105486). Additionally, multiple case reports suggest that goji berry concentrated tea and juice inhibit the metabolism of warfarin, a CYP2C9 substrate (7158,105462). Concomitant use with goji may decrease metabolism and increase levels of CYP2C9 substrates.

CYTOCHROME P450 2D6 (CYP2D6) SUBSTRATES Interaction Rating = Moderate Be cautious with this combination. Severity = Moderate •  Occurrence = Possible •  Level of Evidence = D Theoretically, goji berry might inhibit CYP2D6 and reduce metabolism of CYP2D6 substrates.  Details In vitro research shows that goji berry juice inhibits CYP2D6 enzymes (105486). Concomitant use with goji may decrease metabolism and increase levels of CYP2D6 substrates. However, this has not been reported in humans.

CYTOCHROME P450 3A4 (CYP3A4) SUBSTRATES Interaction Rating = Moderate Be cautious with this combination. Severity = Moderate •  Occurrence = Possible •  Level of Evidence = D Theoretically, goji berry might inhibit CYP3A4 and reduce metabolism of CYP3A4 substrates.  Details In vitro research shows that goji berry juice inhibits CYP3A4 enzymes (105486). Concomitant use with goji may decrease metabolism and increase levels of CYP3A4 substrates. However, this has not been reported in humans.

FLECAINIDE (Tambocor) Interaction Rating = Moderate Be cautious with this combination. Severity = High •  Occurrence = Possible •  Level of Evidence = D Theoretically, goji berry might increase the levels and clinical effects of flecainide.  Details In one case report, a 75-year-old patient stable on flecainide and warfarin presented to the emergency room with fainting and pleomorphic arrhythmia caused by flecainide toxicity. Flecainide toxicity was attributed to drinking 1-2 glasses of concentrated goji tea daily for 2 weeks. Theoretically, goji may have inhibited the cytochrome P450 2D6 (CYP2D6) metabolism of flecainide (105462).

WARFARIN (Coumadin) Interaction Rating = Major Do not take this combination. Severity = High •  Occurrence = Probable •  Level of Evidence = D Goji can increase the effects of warfarin and possibly increase the risk of bleeding.  Details There are at least 5 case reports of increased international normalized ratio (INR) in patients stabilized on warfarin who began drinking goji juice, concentrated goji tea, or goji wine (7158,16529,23896,105462,105487). Goji may inhibit the metabolism of warfarin by cytochrome P450 2C9 (CYP2C9) (7158).

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ANTICOAGULANT/ANTIPLATELET DRUGS Interaction Rating = Moderate Be cautious with this combination. Severity = High •  Occurrence = Possible •  Level of Evidence = D Theoretically, horny goat weed might increase the risk of bleeding.  Details In vitro research and animal research shows that horny goat weed can inhibit platelet aggregation and thrombus formation (105832). This effect has not been reported in humans.

ANTIHYPERTENSIVE DRUGS Interaction Rating = Moderate Be cautious with this combination. Severity = Moderate •  Occurrence = Possible •  Level of Evidence = D Theoretically, horny goat weed might increase the risk of hypotension.  Details Laboratory research suggests that horny goat weed might have hypotensive effects (10346). This effect has not been reported in humans.

CYTOCHROME P450 1A2 (CYP1A2) SUBSTRATES Interaction Rating = Moderate Be cautious with this combination. Severity = Moderate •  Occurrence = Possible •  Level of Evidence = D Theoretically, horny goat weed might increase the effects and side effects of CYP1A2 substrates.  Details In vitro, horny goat weed leaf extract inhibits CYP1A2 (97267). This effect has not been reported in humans.

CYTOCHROME P450 2B6 (CYP2B6) SUBSTRATES Interaction Rating = Moderate Be cautious with this combination. Severity = Moderate •  Occurrence = Possible •  Level of Evidence = D Theoretically, horny goat weed might increase the effects and side effects of CYP2B6 substrates.  Details In vitro, horny goat weed leaf extract inhibits CYP2B6 (97267). This effect has not been reported in humans.

CYTOCHROME P450 3A4 (CYP3A4) SUBSTRATES Interaction Rating = Moderate Be cautious with this combination. Severity = Moderate •  Occurrence = Possible •  Level of Evidence = D Theoretically, horny goat weed might increase the effects and side effects of CYP3A4 substrates.  Details In vitro, horny goat weed extract inhibits CYP3A4 and suppresses CYP3A4 mRNA expression (112708). This effect has not been reported in humans.

ESTROGENS Interaction Rating = Moderate Be cautious with this combination. Severity = Moderate •  Occurrence = Possible •  Level of Evidence = D Theoretically, concomitant use of horny goat weed with estrogens might increase their therapeutic and adverse effects.  Details In vitro evidence suggests that horny goat weed has estrogenic activity. In clinical research, horny goat weed has been shown to increase blood levels of estrogen in some females (16061,16063,16060,55452).

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ESTROGENS Interaction Rating = Moderate Be cautious with this combination. Severity = Moderate •  Occurrence = Possible •  Level of Evidence = D Theoretically, wild yam might increase or decrease the effects of estrogen.  Details Wild yam root shows estrogenic and anti-estrogenic effects in vitro (6180,70411,96723,96725). Theoretically, wild yam might interfere with hormone therapy.

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ANTIDIABETES DRUGS Interaction Rating = Moderate Be cautious with this combination. Severity = Moderate •  Occurrence = Possible •  Level of Evidence = D Theoretically, zizyphus might increase the risk of hypoglycemia when taken with antidiabetes drugs.  Details Animal research shows that zizyphus has hypoglycemic activity (87589,87591,87617,87637,87659,87671). However, a small clinical study shows that zizyphus fruit powder does not reduce fasting blood glucose levels in patients with type 2 diabetes (104507).

CNS DEPRESSANTS Interaction Rating = Moderate Be cautious with this combination. Severity = High •  Occurrence = Possible •  Level of Evidence = D Theoretically, zizyphus might cause additive sedative effects when taken with CNS depressants.  Details Some animal research has found that various parts of zizyphus have sedative effects (87572,87644,87646,87658). However, other animal research shows that zizyphus plant extract does not alter sleep parameters when used in combination with pentobarbital (93308).

CYTOCHROME P450 1A2 (CYP1A2) SUBSTRATES Interaction Rating = Moderate Be cautious with this combination. Severity = Moderate •  Occurrence = Possible •  Level of Evidence = D Theoretically, zizyphus might decrease the levels and clinical effects of drugs metabolized by CYP1A2.  Details Animal research shows that zizyphus induces CYP1A2 enzymes (93311). However, this effect has not been reported in humans.

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General ...Orally, cassia cinnamon appears to be well-tolerated. Significant side effects have not been reported in most patients.
Most Common Adverse Effects:
Topically: Burning mouth, stomatitis.

Dermatologic ...In one clinical trial, a rash was reported in one patient taking cassia cinnamon 1 gram daily for 90 days (17011).
In one case, a 58-year-old female with a documented allergy to topically applied cinnamic alcohol presented with eyelid dermatitis, which was found to be a manifestation of systemic contact dermatitis to cinnamon in the diet. Symptoms improved in two days and completely cleared five days after discontinuing the addition of cinnamon to food products (95599). In other case reports, two adults presented with allergic contact cheilitis following the ingestion of chai tea with cinnamon and yogurt with cinnamon. Cinnamon components were confirmed as the causative allergic agents with patch tests, and both cases of allergic contact cheilitis completely resolved upon cessation of the cinnamon-containing products (113516,113515).
Topically, allergic skin reactions and stomatitis from toothpaste flavored with cassia cinnamon have been reported (11915,11920). Intraoral allergic reactions with symptoms of tenderness and burning sensations of the oral mucosa have also been reported in patients using breath fresheners, toothpaste, mouthwash, candy, or chewing gum containing cinnamon, cinnamic aldehyde or cinnamic alcohol as flavoring agents. Glossodynia, or burning mouth syndrome, has also been reported in a 62-year-old female who ate apples dipped in cinnamon nightly (95598), and allergic contact dermatitis has been reported in a teenage female using a homemade cinnamon sugar face scrub (95596).

Endocrine ...In one clinical trial, a hypoglycemic seizure was reported in one patient taking cassia cinnamon 1 gram daily for 3 months. The event occurred one day after enrolling in the study (89648). It is unclear if cassia cinnamon caused this event.

Hepatic ...There is some concern about the safety of ingesting large amounts of cassia cinnamon for extended durations due to its coumarin content. Coumarin can cause hepatotoxicity in animal models (15299). In humans, very high doses of coumarin from 50-7000 mg/day can result in hepatotoxicity that resolves when coumarin is discontinued (15302). In clinical trials, taking cassia cinnamon 360 mg to 12 grams daily for 3 months did not significantly increase levels of aspartate transaminase (AST) or alanine transaminase (ALT) (21918,96280,108259). However, in one case report, acute hepatitis with elevated AST and ALT occurred in a 73-year-old female who started taking a cinnamon supplement (dose unknown) one week prior to admission. The cinnamon supplement was added on to high-dose rosuvastatin, which may have led to additive adverse hepatic effects. After discontinuing both products, liver function returned to normal, and the patient was able to restart rosuvastati without further complications (97249). In most cases, ingestion of cassia cinnamon won't provide a high enough amount of coumarin to cause significant toxicity; however, in especially sensitive people, such as those with liver disease or taking potentially hepatotoxic agents, prolonged ingestion of large amounts of cassia cinnamon might exacerbate the condition.

Immunologic ...An unspecified allergic reaction was reported in one patient taking cassia cinnamon 1 gram daily for 3 months (89648).

(Read more about CASSIA CINNAMON)

General ...Orally, goji fruit seems to be well tolerated.
Serious Adverse Effects (Rare):
Orally: Allergic reactions including anaphylaxis.

Dermatologic ...A case of photosensitivity secondary to consumption of goji berries has been reported. The patient presented with a pruriginous eruption that had lasted for 2 weeks. The patient had been taking goji berries for 5 months and cat's claw for 3 months. Upon testing, it was revealed that the patient tested positive to goji berries in a photoprovocation test, but not to cat's claw (40263).

Hepatic ...Orally, consumption of goji berries has been associated with a single case report of autoimmune hepatitis (52541). A case of acute hepatitis has also been reported in a female who consumed 2 ounces of a specific combination product (Euforia, Nuverus International) containing goji berry, pomegranate, curcumin, green tea, noni, acai berry, aloe vera, blueberry, resveratrol, mangosteen, and black seed, daily for one month. It is unclear whether the liver injury was caused by goji berry, other ingredients, or the combination (90125).

Immunologic ...Several cases of allergic reactions secondary to consumption of goji berries have been reported. Symptoms included facial angioedema with dyspnea, pharyngeal itching, itching in the mouth, ears, and axilla, labial angioedema, and perioral skin rash (92116). Anaphylaxis has also been reported (52538).

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General ...Orally, horny goat weed seems to be well tolerated when used short-term.
Most Common Adverse Effects:
Orally: Dizziness, dry mouth, nosebleed, thirst, and vomiting.
Serious Adverse Effects (Rare):
Orally: Respiratory arrest.

Cardiovascular ...A 66-year-old male with a history of cardiovascular disease developed tachyarrhythmia after taking horny goat weed for 2 weeks (13006). It is not clear if this product contained only horny goat weed or a combination of ingredients; therefore, assigning causality is not possible.

Gastrointestinal ...Orally, long-term use of horny goat weed has been associated with reports of vomiting, dry mouth, thirst, and nosebleed (10346).

Hepatic ...A case of hepatotoxicity characterized by abdominal pain, nausea, vomiting, and fever has been reported in a 40-year-old male patient with hepatitis C, after a month of taking one tablet daily of a combination product containing horny goat weed and multiple other ingredients (Enzyte, Vianda). Symptoms improved following cessation of the product, but it is not clear if they were due to horny goat weed, another ingredients, or hepatitis C (91590). An observational study over 24 years found 26 cases of drug-induced hepatoxicity associated with horny goat weed (112707).

Musculoskeletal ...Orally, large doses of horny goat weed may cause exaggeration of tendon reflexes to the point of spasm (10346).

Neurologic/CNS ...Orally, long-term use of horny goat weed has been associated with reports of dizziness (10346).

Psychiatric ...There is a case report of hypomania in a 66-year-old male who took horny goat weed for 2 weeks (13006). It is not clear if this product contained only horny goat weed or a combination of ingredients; therefore, assigning causality is not possible.

Pulmonary/Respiratory ...Orally, large doses of horny goat weed may cause respiratory arrest (10346).

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General ...Orally, wild yam is generally well tolerated.
Most Common Adverse Effects:
Orally: Fever, headache, upset stomach, and vomiting.
Serious Adverse Effects (Rare):
Orally: Anaphylaxis.

Gastrointestinal ...Orally, wild yam can cause upset stomach and vomiting, especially at higher doses (12,86450).

Hematologic ...In one case report, a 55-year-old female with protein S deficiency and systemic lupus erythematosus (SLE) had temporary vision loss in the left eye from hemiretinal vein thrombosis 3 days after taking a combination phytoestrogen product containing wild yam 276 mg, dong quai 100 mg, red clover 250 mg, and black cohosh 250 mg (13155). It is unclear if wild yam contributed to this event.

Immunologic ...There are three case reports of anaphylaxis after ingestion of cooked wild yam (96722).

Neurologic/CNS ...Orally, wild yam can cause headache and fever, especially at higher doses (86450).

(Read more about WILD YAM)

General ...Orally, zizyphus fruit extract and powder seem to be well tolerated.

Gastrointestinal ...Orally, zizyphus fruit extract was associated with three cases of mild diarrhea in newborn infants (93306). Zizyphus seed extract was associated with one case of dry mouth and one case of increased bowel movements in a small clinical study (107921).

Neurologic/CNS ...Orally, zizyphus seed extract was associated with two cases of headache in a small clinical study (107921).

(Read more about ZIZYPHUS)