ChoLess Optimizer [Discontinued] by Jarrow Formulas

POSSIBLY EFFECTIVE

• Dyspepsia. Oral artichoke leaf extract may improve symptoms in patients with functional dyspepsia or dyspepsia associated with biliary disease. Details: Several clinical trials in patients with functional dyspepsia or dyspepsia associated with biliary disease show that taking artichoke leaf extract can reduce symptoms such as nausea, vomiting, flatulence, and abdominal pain. Improvement seems to occur after 2 to 8 weeks of treatment (2056,11429,12208). The validity of some of this evidence is limited by a small sample size (2056) or lack of a control group (11429). However, a higher-quality clinical trial in patients with mild dyspepsia shows that taking artichoke leaf extract 640 mg three times daily for 6 weeks improves overall symptom and quality of life scores. Specifically, patient ratings for flatulence, feelings of fullness, and early satiety were reduced when compared with placebo. Further, for every 12 patients treated with this extract over placebo, one additional patient reported markedly or completely improved symptoms (12208). Some studies have used a specific extract called ALE LI 220 (Hepar-SL forte, Serturner Arzneimittel GmbH) at doses ranging from 320-640 mg three times daily for up to 8 weeks (2056,12208). Another study has used a different artichoke leaf extract (Cynara SL, Lichtwer Pharma) at a dose of 320-640 mg daily for 2 months (11429). Some clinical research has also assessed artichoke extract in combination with ginger extract. Results show that taking 2 capsules of a specific product containing artichoke leaf extract 100 mg and ginger extract 20 mg (ProDigest, Indena) daily for 4 weeks markedly or completely improves symptoms such as nausea, fullness, pain, and bloating in about 1.5-fold more patients with functional dyspepsia when compared with placebo (91474).
• Hyperlipidemia. Most research shows that oral artichoke lowers cholesterol and triglyceride levels in patients with hyperlipidemia. However, frozen artichoke juice does not appear to have these effects. Details: Multiple meta-analyses and clinical studies in patients who are either healthy or have hyperlipidemia, nonalcoholic fatty liver disease, or pre-obesity show that taking artichoke leaf extract or concentrated artichoke juice capsules daily for 4-24 weeks reduces total cholesterol by 13-18 mg/dL, low-density lipoprotein (LDL) cholesterol by 15-17 mg/dL, and triglycerides by 9-18 mg/dL, but does not increase high-density lipoprotein (HDL) cholesterol, when compared with placebo (104132,108713,111560,111564). While the five studies including non-hyperlipidemic patients in one of these analyses reported mixed results, all four of the studies evaluating artichoke leaf extract in patients with hyperlipidemia showed significant reductions in total cholesterol and LDL cholesterol when compared with placebo (104132). Additionally, a dose-response analysis suggests that baseline cholesterol levels are a stronger predictor of benefit than dose and treatment duration (108713). The validity of these findings is limited due to the high heterogeneity of studies included in meta-analyses. Another clinical study in patients with mild hypercholesterolemia shows that taking artichoke extract 250 mg twice daily for 8 weeks decreases LDL cholesterol by about 11% and increases HDL cholesterol by about 10% when compared with placebo (91478). Other formulations have also been evaluated, including cynarin, a constituent of artichoke, and artichoke juice. Some older, small clinical studies suggest that taking cynarin 20 mg three times daily for 2-7 months reduces total cholesterol and triglyceride levels when compared to baseline in patients with hypercholesterolemia and/or hypertriglyceridemia (52222,52223,52236). However, cynarin does not appear to reduce cholesterol levels in patients with familial type II hyperlipoproteinemia (1424). In patients with hyperlipidemia, consuming frozen artichoke juice 20-30 mL daily for 6-12 weeks does not appear to reduce total or LDL cholesterol levels and may even increase triglyceride levels (52216,52234). Artichoke leaf extract has also been evaluated in combination with other ingredients. Clinical research shows that taking a product containing red yeast rice extract, artichoke leaf extract, and other ingredients (Limicol, Laboratoire Lescuyer) 3 or 6 tablets daily for 4-16 weeks decreases LDL cholesterol by 14% to 21% in patients with hyperlipidemia. However, the red yeast in this product contains monacolin K (lovastatin), which likely contributed to the cholesterol-lowering effect (89451,89452,89454). Another specific product (Vazguard; Indena SpA), containing artichoke leaf extract (Indena SpA) 100 mg and bergamot phytosome 600 mg, has also shown benefit in patients with mild hypercholesterolemia when taken twice daily for 2 months (108712). However, it is unclear if this effect is due to artichoke leaf, bergamot, or the combination.

INSUFFICIENT RELIABLE EVIDENCE to RATE

• Biliary disorders. Although there has been interest in using oral artichoke for various biliary disorders, including for the treatment of cholestasis or prevention of gallstones, there is insufficient reliable information about the clinical effects of artichoke for these conditions.
• Diabetes. Several small clinical studies suggest that oral artichoke extract may slightly reduce fasting blood glucose, but may not improve glycated hemoglobin (HbA1c) or other measures of glycemic control, in patients with diabetes. Details: A meta-analysis of 9 small clinical trials shows that taking artichoke leaf extract for 8-12 weeks reduces fasting blood glucose by around 5 mg/dL, but does not improve HbA1c, insulin levels, or markers of insulin resistance, when compared with placebo (105768). The generalizability of these findings to patients with diabetes is limited; only 2 of the 9 studies specifically enrolled patients with diabetes. The other studies included patients who were overweight or with liver disease, hyperlipidemia, or metabolic syndrome. In contrast, a post-hoc analysis of clinical research in overweight adults at risk for developing diabetes shows that taking a specific artichoke leaf product (Altilix, Bionap S.r.l.) 50 mg daily for 6 months reduces HbA1c by around 0.9% and improves measures of insulin resistance and beta-cell function when compared with placebo (111564).
• Hangover. It is unclear if oral artichoke extract is beneficial for the prevention of hangover. Details: A small clinical study in healthy adults shows that taking artichoke extract 960 mg immediately before and after alcohol consumption does not prevent alcohol-induced hangover when compared with placebo (11774).
• Hepatitis C. It is unclear if oral artichoke is beneficial in patients with hepatitis C. Details: One small clinical study in patients with chronic hepatitis C shows that taking artichoke leaf extract 3200 mg daily for 12 weeks does not normalize liver enzyme levels or reduce viral load when compared to baseline. Although symptoms such as fatigue, abdominal discomfort, and joint problems appear to improve in the first 4 weeks, the improvement is not maintained over 12 weeks (91475). However, another small clinical study shows that drinking a tea infusion of wild artichoke three times daily for 3 months normalizes liver enzymes and serum virus levels in 12 of 15 patients with hepatitis C (97717). The validity of these findings is limited by the lack of a control group.
• Hypertension. Analyses of small clinical studies suggest that oral artichoke may slightly reduce blood pressure in patients with hypertension; however, individual study results are conflicting, and the improvements in blood pressure may not be clinically significant. Details: Evidence regarding an association between artichoke consumption and hypertension is conflicting (91477,104133,105767,111561). Two meta-analyses include many of the same studies yet reach contradictory conclusions. One meta-analysis of 8 small clinical trials shows that taking artichoke leaf extract, powder, or juice for 8-12 weeks does not reduce systolic blood pressure (SBP) or diastolic blood pressure (DBP). However, subgroup analysis in patients with documented hypertension shows that artichoke reduces SBP by around 3 mmHg and DBP by around 2 mmHg when compared with placebo (105767). In contrast, another meta-analysis of 7 small clinical trials shows that taking artichoke 50-2700 mg daily for 4-12 weeks reduces SBP by about 2 mmHg and DBP by about 1.5 mmHg. Subgroup analysis shows that the greatest reductions in SBP and DBP occur in doses of 500 mg daily or less, at durations longer than 8 weeks, and in patients under 50 years old (111561). Discrepancies between the results of the meta-analyses with overlapping studies may be due to the former meta-analysis including artichoke supplementation in combination with other ingredients, while the latter meta-analysis focused on artichoke supplementation alone.
• Irritable bowel syndrome (IBS). It is unclear if oral artichoke leaf extract is beneficial in patients with IBS. Details: Some observational research in patients with IBS has found that taking a specific artichoke leaf extract (Hepar-SL forte, Serturner Arzneimittel GmbH) 640 mg three times daily for 6 weeks is associated with reductions in abdominal pain, cramping, bloating, flatulence, and constipation when compared to baseline (2562). Also, a small clinical study in patients with IBS shows that taking a different specific artichoke leaf extract (Cynara SL, Lichtwer Pharma) 320-640 mg daily for 2 months reduces the incidence of IBS symptoms in patients with dyspepsia by about 26% when compared to baseline. Patients taking this extract also had improved quality of life (15204). The validity of these findings is limited by the lack of a control group.
• Metabolic syndrome. It is unclear if oral artichoke leaf extract is beneficial in patients with metabolic syndrome. Details: A small clinical trial in patients with metabolic syndrome shows that taking artichoke leaf extract 1800 mg daily for 12 weeks does not improve fasting blood glucose, insulin resistance, total cholesterol, low-density lipoprotein (LDL) cholesterol, high-density lipoprotein (HDL) cholesterol, or blood pressure when compared with placebo. However, taking artichoke extract does reduce triglycerides by around 27 mg/dL when compared with placebo (100935).
• Nausea and vomiting. Although there has been interest in using oral artichoke for nausea and vomiting, there is insufficient reliable information about the clinical effects of artichoke for this purpose.
• Nonalcoholic fatty liver disease (NAFLD). It is unclear if oral artichoke leaf extract is beneficial in patients with NAFLD. Details: Meta-analyses of 12 clinical studies in adults with a variety of metabolic disorders, including NAFLD, show that taking artichoke 50-2700 mg daily for 4-24 weeks reduces alanine aminotransferase (ALT) and aspartate aminotransferase (AST) when compared with placebo (111560,111563). These effects are greater for ALT in trials lasting 8 weeks or longer and for AST at doses over 500 mg daily (111563). The validity of these findings is limited by significant heterogeneity among the included studies. A small clinical trial in patients with NAFLD shows that taking a specific artichoke leaf extract (Cynarol, Niak Pharmaceuticals), standardized to contain cynarin 2%, as 200 mg three times daily for 2 months improves NAFLD severity, reduces liver size, and increases hepatic vein flow when compared with placebo. The severity of NAFLD improved in 82% of patients taking artichoke, compared with 5% taking placebo. NAFLD severity did not worsen in any patients taking artichoke, compared with 27.5% of those taking placebo. Serum levels of liver transaminases, total bilirubin, and lipids were also improved with artichoke when compared with placebo (100934). However, the validity of these findings is limited by inappropriate randomization, the use of a per-protocol analysis, and significant differences between groups at baseline. Artichoke leaf extract has also been evaluated in combination with conventional therapies. A clinical trial shows that taking metformin 500 mg twice daily and/or vitamin E 400 IU once daily along with a specific artichoke leaf extract (Tishoke; Goldaru Company) 400 mg twice daily, providing 40 mg chlorogenic acid daily, for 12 weeks improves NAFLD severity and reduces liver size when compared with baseline. However, these improvements were similar to those seen in patients taking metformin with vitamin E. After 12 weeks, the number of patients with no fat accumulation (steatosis grade 0) increased by 23% in the artichoke and metformin group, 17% in the artichoke and vitamin E group, and 10% in the metformin and vitamin E group (108714)
• Obesity. A meta-analysis of several small clinical studies suggests that oral artichoke extract may slightly reduce waist circumference, but not body weight or body mass index (BMI), in patients who are overweight or obese. Details: A meta-analysis of 10 small clinical trials shows that taking artichoke leaf extract, powder, or juice for 8-12 weeks reduces waist circumference by 1.11 cm, but does not improve body weight or BMI, when compared with placebo (105766). The generalizability of these findings to patients who are overweight or obese is limited by the fact that only 3 of the 10 trials specifically enrolled patients because they were overweight. Other studies evaluated patients with liver disease, metabolic syndrome, diabetes, hyperlipidemia, or hypertension. In contrast, a post-hoc analysis of clinical research in adults with overweight shows that taking an artichoke leaf supplement (Altilix, Bionap S.r.l.) 150 mg daily for 6 months reduces body weight by around 2.3 kg but does not improve waist circumference when compared with placebo (111564).
• Osteoarthritis. Although there has been interest in using oral artichoke for osteoarthritis, there is insufficient reliable information about the clinical effects of artichoke for this purpose. More evidence is needed to rate artichoke for these uses.

(Read more about ARTICHOKE)

LIKELY EFFECTIVE

• Hyperlipidemia. Most research shows that red yeast rice supplements lower lipid levels in patients with high cholesterol. This effect is likely due to the monacolin K (lovastatin) content of red yeast rice products. Details: Clinical research shows that taking certain red yeast rice products 1-5 grams daily for up to 24 weeks can lower total cholesterol by up to 23% and low-density lipoprotein (LDL) cholesterol by up to 34% when compared with placebo or control. Some of these products include Cholestin (Pharmanex), Xuezhikang (WBL Peking University Biotech Co, Ltd.) , Red Yeast Rice (Sylvan Bioproducts), and HypoCol (AsiaPharm Biotech) (2624,6988,16836,17089,70491,70509,95666,107951). Meta-analyses of clinical studies, which include some of these studies, show that taking red yeast rice 100-4800 mg daily for up to 4.5 years reduces LDL cholesterol by about 21-29 mg/dL and triglycerides by 20-27 mg/dL, and increases high-density lipoprotein (HDL) cholesterol by about 3 mg/dL, when compared with placebo. These meta-analyses included various patient populations, including those with hyperlipidemia, cardiovascular disease, or hypertension (103310,110583,110584). These and other red yeast rice products provide up to 10-20 mg daily of monacolin K, which is identical to the drug lovastatin (95666). The United States Food and Drug Administration (FDA) considers red yeast rice products that contain statins to be illegal, unapproved drugs (6610). In Germany, red yeast rice products with a daily monacolin K (lovastatin) dose greater than 5 mg are classified as drugs (98822). Health Canada allows red yeast rice products containing only trace amounts of lovastatin (i.e. 1 mg or less daily) to be marked as natural health products (110586). The European Union limits the amount of monacolin K (lovastatin) content to less than 3 mg daily in red yeast rice products (110587). However, the amount of monacolin K in products is not always clearly stated on the label. While some red yeast rice products available in the US contain little or no statin constituents, many still contain significant concentrations of statins. One analysis shows that that some of these products can contain up to 5 mg of statins per tablet (95903). It is not known whether red yeast rice products that contain a lower concentration of statins can significantly reduce cholesterol levels in patients with hyperlipidemia. Accordingly, the recommendations from various clinical societies differ regarding red yeast rice. While the American College of Cardiology/American Heart Association guidelines do not mention red yeast rice, the European Society of Cardiology recommends against its use (110588,110589). The International Lipid Expert Panel suggests consideration of red yeast rice for certain patients for primary cardiovascular prevention, including those who are statin-intolerant or unwilling to take a statin, but recommends against use of red yeast rice for secondary cardiovascular prevention (110585). Some studies have also evaluated combination products containing red yeast rice, such as Limicol (Laboratoire Lescuyer), Armolipid Plus (Rottapharm S.p.A.), and Prelipid Prevention Meds, Inc. Taking these products for 4-24 weeks seems to modestly reduce total and LDL cholesterol levels in patients with dyslipidemia (18110,34262,89451,89452,89454,92142,95663). One of these products (Armolipid Plus, Rottapharm S.p.A.), containing red yeast rice, berberine, policosanol, and other ingredients, which has been studied in over 12 clinical trials in patients with hypercholesterolemia, modestly reduces total and LDL cholesterol and triglyceride levels, and improves HDL cholesterol, when compared with baseline or placebo (34283,89438,92142,107952). This product has also been shown to further lower lipid levels when added to low-dose statin or ezetimibe therapy in patients with coronary heart disease and a history of percutaneous intervention (97232,97233). Another combination product (DIF1STAT) containing monacolin K 2.5-2.9 mg, niacin 27 mg, and unknown doses of olive oil extract, green tea extract, and various B vitamins decreases total and LDL cholesterol when compared with placebo (107953).

POSSIBLY EFFECTIVE

• HIV/AIDS-related dyslipidemia. Oral red yeast rice seems to reduce lipid levels in patients with dyslipidemia due to HIV. Details: A very small clinical study in adults with dyslipidemia due to HIV shows that taking red yeast rice (Cholestin) 1.2 grams twice daily for 8 weeks seems to reduce total and low-density lipoprotein cholesterol when compared with placebo (9475).
• Myocardial infarction (MI). Oral red yeast rice seems to reduce recurrence of non-fatal MI in some patients. Details: A meta-analysis of 4 clinical trials in over 10,000 individuals with a previous MI shows that taking red yeast rice 1.2 grams in two divided doses daily for 4 or 4.5 years reduces the incidence of nonfatal MI by 58%, revascularization by 42%, and sudden death by 29% when compared with placebo; however, there was no effect on the incidence of fatal MI (103310). All clinical trials used a specific red yeast rice extract (Xuezhikang, WBL Peking University Biotech Co, Ltd.) (70508,70513,70520,103310). Furthermore, all of the available research has been conducted in China; it is unclear if these benefits can be extrapolated to other geographic locations.

POSSIBLY INEFFECTIVE

• Hypertension. Adding oral red yeast rice to antihypertensive medications does not seem to further lower blood pressure. Details: Small clinical studies in patients with hypertension with or without a history of myocardial infarction shows that taking a specific red yeast rice extract (Xuezhikang, WBL Peking University Biotech Co, Ltd.) 1200 mg daily for up to 2 years, along with antihypertensive drugs such as nifedipine and valsartan, does not further reduce blood pressure when compared with using antihypertensive drugs alone (70519,70521,70526,70530).

INSUFFICIENT RELIABLE EVIDENCE to RATE

• Atherosclerosis. It is unclear if oral red yeast rice is beneficial for reducing atherosclerotic plaque. Details: A meta-analysis of 20 mostly low-to-moderate quality clinical studies that included 2217 patients with atherosclerosis shows that taking red yeast rice alone or with other statins improves markers of carotid atherosclerosis and modestly reduces blood lipid levels when compared with placebo, usual care, or statins. Studies were with specific red yeast rice products Xuezhikang (WBL Peking University Biotech Co, Ltd) or Zhibitai at daily doses up to 1800 mg or 960 mg, respectively, for 3-12 months (110582). The validity of the findings from this meta-analysis is limited by the heterogeneity of the included studies. Furthermore, all of these studies were conducted in China; it is unclear if these benefits can be extrapolated to other geographic locations.
• Cancer. It is unclear if oral red yeast rice is beneficial for reducing cancer mortality. Details: Clinical research in Chinese adults with a history of heart attack shows that taking red yeast rice extract (Xuezhikang, WBL Peking University Biotech Co, Ltd.) 1.2 grams daily for an average of 4.5 years decreases the risk of cancer mortality by 22% to 56% when compared with placebo (70513,70520). However, it is not clear if red yeast rice reduces the risk of cancer development or recurrence.
• Coronary heart disease (CHD). Although there is interest in using oral red yeast rice for CHD, there is insufficient reliable information about the clinical effects of red yeast rice for this condition.
• Diabetes. Although there is interest in using oral red yeast rice for diabetes, there is insufficient reliable information about the clinical effects of red yeast rice for this condition.
• Liver cancer. It is unclear if red yeast rice lowers the risk of developing liver cancer. Details: In a large population study conducted in Taiwan, people who consumed a specific red yeast rice product (LipoCol Forte) 600 mg (equivalent to about 6 mg of lovastatin) twice daily for at least one year had a 9% lower risk of developing liver cancer than people who had not taken red yeast rice. The risk of developing liver cancer continued to decrease with ongoing use of the supplement, with the lowest rate seen after 6 years of follow-up (112090).
• Metabolic syndrome. It is unclear if oral red yeast rice is beneficial in patients with metabolic syndrome. Details: A meta-analysis of mostly small, low-to-moderate quality studies in adults with metabolic syndrome suggests that taking red yeast rice modestly reduces glycated hemoglobin (HbA1c), fasting glucose, and lipid levels, and improves markers of insulin resistance, when compared with placebo, usual care, or other lipid-lowering treatments. Most studies were short-term and used a specific red yeast rice product (Xuezhikang, WBL Peking University Biotech Co, Ltd.) at an unknown dose (110580¬). The validity of the findings from this meta-analysis is limited by the heterogeneity of the included studies. Furthermore, the included studies were conducted in China; it is unclear if these benefits can be extrapolated to other geographic locations. Red rice yeast has also been evaluated in combination with other ingredients. A small clinical study in adults with metabolic syndrome shows that taking a specific combination product (Liposcudil Plus, Piam Farmaceutici SPA) containing monacolin K 10 mg and coenzyme Q10 30 mg once daily for 2 months, in conjunction with a Mediterranean diet, seems to modestly decrease blood pressure and lipid levels when compared with following the diet alone (98821). Clinical research in patients with metabolic syndrome and left ventricular hypertrophy shows that taking a specific product (Armolipid Plus, Rottapharm Madaus Spa) containing red yeast rice extract 200 mg, berberine 500 mg, and policosanol 10 mg daily for 6 months improves lipid profile and reduces left ventricular mass (LVM) when compared with placebo. LVM reduction occurred in 57% of patients taking the product, compared with 28% of those taking placebo (103311). It is unclear if any of these benefits are due to red yeast rice, other ingredients, or the combinations.
• Nonalcoholic fatty liver disease (NAFLD). Although there is interest in using oral red yeast rice for NAFLD, there is insufficient reliable information about the clinical effects of red yeast rice for this condition.
• Overall mortality. It is unclear if oral red yeast rice reduces mortality. Details: A meta-analysis of 2 moderate quality studies that included 3295 adults suggests that taking a specific red yeast rice product (Xuezhikang, WBL Peking University Biotech Co, Ltd.) at an unknown dose for up to 4-4.5 years reduces mortality by 38% when compared with placebo. This analysis also suggests red yeast rice reduces the incidence of major adverse cardiovascular events (MACE) by 46% when compared with placebo or routine care (110580). The validity of the findings from this meta-analysis is limited by the heterogeneity of the included patients. Furthermore, the included studies were conducted in China; it is unclear if these benefits can be extrapolated to other geographic locations.
• Postoperative recovery. It is unclear if oral red yeast rice is beneficial for recovery after surgery. Details: Observational research in Taiwanese patients has found that taking red yeast rice prior to major inpatient surgery is associated with lower odds of postoperative bleeding, pneumonia, stroke, and mortality, as well as a shorter hospital stay, when compared with a control group (100246).
• Stroke. It is unclear if oral red yeast rice reduces the risk of stroke. Details: Observational research in Taiwanese adults without a prior stroke suggests that taking a specific red yeast rice product (LipoCol Forte) is associated with a 35% reduction in the risk of stroke when compared with patients who did not take red yeast rice (110581). However, it is unclear if these results are due to red yeast rice or other factors, since patients who took red yeast rice were less likely to have comorbidities such as hypertension, diabetes, or ischemic heart disease. More evidence is needed to rate red yeast for these uses.

(Read more about RED YEAST RICE)

POSSIBLY EFFECTIVE

• Diabetes. Oral tocotrienols may improve glycemic control in adults with type 2 diabetes. Details: A meta-analysis of 8 clinical trials of adults with type 2 diabetes shows that taking a tocotrienol-rich fraction, primarily derived from palm fruit, 250-400 mg daily for 2-18 months leads to slight improvements in glycated hemoglobin (HbA1c) when compared with placebo (112286). The benefit was primarily among those with a higher baseline HbA1c, a duration of diabetes less than 10 years, and in studies with a duration of less than 6 months. Most studies were rated high quality with a low risk of bias, but most were also small with moderate heterogeneity. Most of the studies were conducted in Malaysia, where tocotrienol-rich palm oil was already regularly consumed as part of the diet, potentially limiting the generalizability of the findings to other populations with different baseline tocotrienol intakes.

POSSIBLY INEFFECTIVE

• Hypercholesterolemia. Oral tocotrienols are not likely to induce clinically meaningful improvements in cholesterol levels. Details: A meta-analysis of 19 small clinical trials shows that taking tocotrienols 50-600 mg daily for 1-6 months does not decrease levels of total cholesterol, low density lipoprotein (LDL) cholesterol, or triglycerides when compared with control. Tocotrienols were shown to increase levels of high-density lipoprotein (HDL) cholesterol by a modest and clinically insignificant amount. Sub-group analyses did not find that baseline lipid levels, or dose and duration of tocotrienol supplementation, notably alter results (104430). These findings are limited because the studies included not only patients with hypercholesterolemia, but also healthy patients and patients with various conditions such as type 2 diabetes, metabolic syndrome, and kidney disease. Tocotrienols have also been studied in combination with tocopherols (28730,85107,104430) and polymethoxylated flavones (99694) without notable benefit.

INSUFFICIENT RELIABLE EVIDENCE to RATE

• Age-related cognitive decline. Oral tocotrienols have only been evaluated in combination with other ingredients; their effect when used alone is unclear. Details: A small study in healthy adults over 40 years of age with self-diagnosed, subjective memory decline shows that taking a specific combination supplement (BGG Japan Co.) containing tocotrienols 50mg and astaxanthin 9 mg daily for 12 weeks modestly improves composite and verbal memory when compared with placebo (105099). This study was funded by the supplement manufacturer.
• Aging. Although there is interest in using oral tocotrienols for aging, there is insufficient reliable information about the clinical effects of tocotrienols for this condition.
• Alzheimer disease. Although there is interest in using oral tocotrienols for Alzheimer disease, there is insufficient reliable information about the clinical effects of tocotrienols for this condition.
• Alopecia areata. Although there is interest in using topical tocotrienols for alopecia areata, there is insufficient reliable information about the clinical effects of tocotrienols for this condition.
• Breast cancer. It is unclear if oral tocotrienols are beneficial for improving early breast cancer outcomes or preventing recurrence. Details: Clinical research in Malaysian patients with early-stage breast cancer shows that taking tocotrienols 200 mg daily, in conjunction with tamoxifen 20 mg daily for up to 5 years, does not improve survival or reduce the rate of cancer recurrence when compared with taking tamoxifen with placebo (99697). The validity of this study is limited by the lack of randomization and insufficient power to evaluate an effect on cancer-related mortality.
• Chronic kidney disease (CKD). Although there is interest in using oral tocotrienols for CKD, there is insufficient reliable information about the clinical effects of tocotrienols for this condition.
• Diabetic nephropathy. It is unclear if oral tocotrienol-rich vitamin E is beneficial for slowing diabetic nephropathy progression. Details: A small clinical study in patients with diabetic nephropathy shows that taking a specific tocotrienol-rich vitamin E supplement (Tocovid SupraBio, Hovid Nutriworld) 200 mg twice daily for 12 weeks seems to modestly reduce serum creatinine, with a corresponding increase in estimated glomerular filtration rate (eGFR), when compared with placebo. According to a sub-group analysis, these improvements remained statistically significant in patients with low tocopherol levels (less than 42 mcmol/L) at baseline, but not in those with higher levels at baseline (103010). Another small clinical study shows that taking this same supplement regimen for 12 months reduces serum creatinine levels and improves eGFR at 8 months, but not 12 months, when compared with placebo. In a subgroup analysis of patients with stage 3 chronic kidney disease, these benefits persisted at 12 months when compared with placebo (107390).
• Familial dysautonomia. It is unclear if oral tocotrienols are beneficial for familial dysautonomia outcomes. Details: A small clinical study in patients with familial dysautonomia shows that taking tocotrienols 100 mg for 3-4 months decreases the number of hypertensive crises by at least 50% in about 80% of patients when compared to baseline (28720). However, another small clinical study shows that taking tocotrienols 50 mg or 100 mg daily for 3 months improves subjective symptom reports, but does not improve objective clinical measurements, when compared to baseline (99700). The validity of these findings is limited by small study sizes and the absence of comparator groups.
• Hypertrophic scars. It is unclear if topical tocotrienols improve hypertrophic scar appearance or vascularity. Details: A clinical study in adults with recently healed surgical scars shows that applying a cream containing 5% tocotrienols twice daily for 6 weeks does not improve scar appearance or vascularity at the end of treatment or 10 weeks after treatment completion when compared with a placebo cream (99699). It is unclear if a cream containing a greater concentration of tocotrienols might be beneficial.
• Impaired glucose tolerance (prediabetes). It is unclear whether oral tocotrienols are beneficial in patients with prediabetes. Details: A small clinical trial in adults with untreated prediabetes shows that taking delta-tocotrienol 300 mg orally daily for 12 weeks reduces fasting plasma glucose and insulin levels and improves glycated hemoglobin and the homeostatic model assessment for insulin resistance (HOMA-IR) when compared with placebo (107856).
• Metabolic syndrome. Oral tocotrienols have only been evaluated in combination with other ingredients; their effect when used alone is unclear. Details: A moderate sized clinical trial in adults with metabolic syndrome shows that taking delta-tocotrienols 500 mg and resveratrol 300 mg daily for 24 weeks improves body weight, waist circumference, blood pressure, fasting blood glucose, serum triglycerides, total cholesterol, high-density lipoprotein cholesterol, and markers of inflammation and oxidative stress compared with placebo (112144). It is unclear if these effects are due to the tocotrienols, resveratrol, or the combination.
• Nonalcoholic fatty liver disease (NAFLD). Small clinical studies suggest that oral tocotrienols may modestly improve steatosis and other outcomes in patients with NAFLD. Details: A small clinical trial in adults with NAFLD shows that taking tocotrienols 200 mg twice daily for one year might reduce steatosis, as measured by ultrasound hepatic echogenic response, when compared with placebo (99695). Another small clinical trial in overweight or obese adults with NAFLD shows that taking a specific product (American River Nutrition, Inc.) containing 90% delta-tocotrienol and 10% gamma-tocotrienol, as 300 mg twice daily for 24 weeks, modestly reduces fatty liver index (FLI), hepatic steatosis measured by ultrasound, and liver enzyme levels when compared with placebo (104428). These findings are limited because liver biopsy was not used to determine disease progression. Assessment by liver ultrasound examination has limited accuracy when used in obese patients and when testing for steatohepatitis or fibrosis.
• Postmenopausal conditions. It is unclear if oral tocotrienols are beneficial for improving symptoms in postmenopausal patients. Details: A small clinical study in postmenopausal patients shows that taking a specific product (DeltaGold70) 430 mg or 860 mg daily, containing 300 mg or 600 mg tocotrienols, respectively, for 12 weeks does not improve quality of life, body weight, or body fat percentage when compared with placebo (99690).
• Stroke. It is unclear if oral tocotrienols are beneficial for improving outcomes in patients after stroke or transient ischemic attack (TIA). Details: Observational research in patients after an ischemic stroke or TIA has found that taking tocotrienols 400 or 800 mg daily for one year is associated with reduced resistance to aspirin in patients using aspirin with clopidogrel, but not in patients using only aspirin or only clopidogrel, when compared with placebo (104429).
• Wound healing. Although there is interest in using topical tocotrienols for wound healing, there is insufficient reliable information about the clinical effects of tocotrienols for this condition. More information is needed to rate tocotrienols for these uses.

(Read more about TOCOTRIENOLS)

LIKELY SAFE ...when used orally in amounts commonly found in foods. Artichoke has Generally Recognized As Safe status (GRAS) for use in foods in the US (4912).

POSSIBLY SAFE ...when used orally and appropriately in medicinal amounts. Artichoke extract has been used with apparent safety at doses up to 3200 mg daily for up to 12 weeks (6282,15204,52235,91475,91478,100934). Artichoke leaf powder has been used with apparent safety at a dose of 1000 mg daily for up to 8 weeks (104133). Cynarin, a constituent in artichoke extract, has been used with apparent safety at daily doses of 750 mg daily for up to 3 months or 60 mg daily for up to 7 months (1423,1424,52222,52223,52236).

PREGNANCY AND LACTATION:
There is insufficient reliable information available about the safety of artichoke when used in medicinal amounts during pregnancy or lactation; avoid amounts greater than those found in foods.

(Read more about ARTICHOKE)

POSSIBLY SAFE ...when used orally and appropriately. Red yeast rice 1.2 grams daily has been used with apparent safety in clinical studies for up to 4.5 years (512,2624,6988,6995,6996,17089,18110,70508,70513) (70520,70525,70530,95664,95666). However, red yeast rice products can contain an HMG-CoA reductase inhibitor identical to lovastatin, and can cause the same side effects as this drug. It is recommended that people taking red yeast rice products be monitored for the same hepatic and muscle-related adverse effects that are seen with lovastatin (98822).

PREGNANCY: LIKELY UNSAFE
when used orally. The red yeast rice constituent, lovastatin, has induced fetal skeletal malformations in animals (2619). The US Food and Drug Administration (FDA) recommends that most patients discontinue statin therapy during pregnancy due to the risks to the fetus; however, in certain high-risk patients, a prescription statin may be continued during pregnancy (107954).

LACTATION:
Insufficient reliable information available; avoid using. The US FDA recommends against breastfeeding while taking statins (107954).

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POSSIBLY SAFE ...when used orally and appropriately. Tocotrienols have been used with apparent safety at doses of up to 600 mg daily for up to 18 months (99690,99695,99696,104427,104428,112286). Tocotrienols have also been used with apparent safety at a dose of 200 mg daily for up to 5 years (99697). There is insufficient reliable information available about the safety of tocotrienols when applied topically.

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

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ANTIDIABETES DRUGS Interaction Rating = Moderate Be cautious with this combination. Severity = Moderate •  Occurrence = Possible •  Level of Evidence = D Theoretically, artichoke leaf extract may increase the risk of hypoglycemia when taken with antidiabetes drugs.  Details A meta-analysis of small clinical studies shows that taking artichoke leaf extract for 8-12 weeks can modestly reduce fasting plasma glucose when compared with placebo (105768).

ANTIHYPERTENSIVE DRUGS Interaction Rating = Moderate Be cautious with this combination. Severity = Moderate •  Occurrence = Possible •  Level of Evidence = D Theoretically, artichoke leaf extract may increase the risk of hypotension when taken with antihypertensive drugs.  Details A meta-analysis of small clinical studies in patients with hypertension shows that taking artichoke can reduce systolic blood pressure by around 3 mmHg and diastolic blood pressure by around 2 mmHg when compared with placebo (105767).

CYTOCHROME P450 2B6 (CYP2B6) SUBSTRATES Interaction Rating = Moderate Be cautious with this combination. Severity = Moderate •  Occurrence = Possible •  Level of Evidence = D Theoretically, artichoke might increase serum levels of drugs metabolized by CYP2B6.  Details In vitro research shows that artichoke leaf extract inhibits CYP2B6 activity (97717). However, this interaction has not been reported in humans.

CYTOCHROME P450 2C19 (CYP2C19) SUBSTRATES Interaction Rating = Moderate Be cautious with this combination. Severity = Moderate •  Occurrence = Possible •  Level of Evidence = D Theoretically, artichoke might increase serum levels of drugs metabolized by CYP2C19.  Details In vitro research shows that artichoke leaf extract inhibits CYP2C19 activity (97717). However, this interaction has not been reported in humans.

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CYCLOSPORINE (Neoral, Sandimmune) Interaction Rating = Moderate Be cautious with this combination. Severity = Moderate •  Occurrence = Probable •  Level of Evidence = D Theoretically, taking red yeast rice in combination with cyclosporine might increase the risk of myopathy.  Details Red yeast rice contains varying levels of the statin drug lovastatin (9587,15017). Cyclosporine has been reported to increase plasma levels of lovastatin by 5- to 20-fold, resulting in reports of myopathy and rhabdomyolysis (104951).

CYTOCHROME P450 3A4 (CYP3A4) INHIBITORS Interaction Rating = Moderate Be cautious with this combination. Severity = Moderate •  Occurrence = Possible •  Level of Evidence = D Theoretically, drugs that inhibit the CYP3A4 enzymes might increase levels of lovastatin from red yeast rice.  Details Red yeast rice contains varying levels of the statin drug lovastatin, which is metabolized by CYP3A4 (104951). Combining red yeast rice with CYP3A4 inhibitors might increase serum levels of lovastatin from red yeast rice.

GEMFIBROZIL (Lopid) Interaction Rating = Moderate Be cautious with this combination. Severity = Moderate •  Occurrence = Probable •  Level of Evidence = D Theoretically, taking red yeast rice in combination with gemfibrozil might increase the risk of rhabdomyolysis.  Details Red yeast rice contains varying levels of the statin drug lovastatin (9587,15017). Gemfibrozil has been reported to increase the risk of rhabdomyolysis when used in combination with lovastatin (104951).

HEPATOTOXIC DRUGS Interaction Rating = Moderate Be cautious with this combination. Severity = High •  Occurrence = Possible •  Level of Evidence = D Theoretically, concomitant use might increase the risk of liver damage.  Details Red yeast rice contains varying levels of the drug lovastatin. Lovastatin can cause liver damage in some people (104951). Some clinical research suggests that supplements containing red yeast rice might increase liver enzyme levels in some, but not all, participants (42692,70491). Cases of acute hepatitis have been associated with red yeast rice (16654,54477). Combining it with hepatotoxic drugs might further increase this risk.

HMG-CoA REDUCTASE INHIBITORS ("Statins") Interaction Rating = Moderate Be cautious with this combination. Severity = Moderate •  Occurrence = Probable •  Level of Evidence = D Theoretically, taking red yeast rice with other statins might increase the risk of potential adverse effects.  Details Red yeast rice contains varying levels of the statin drug lovastatin and might result in supratherapeutic levels when used with other statins. Based on evaluation of data from the US Food and Drug Administration's adverse event reporting system (FAERS), it is recommended that red yeast rice products be avoided in people taking prescription statins (98822).

NIACIN Interaction Rating = Moderate Be cautious with this combination. Severity = Moderate •  Occurrence = Probable •  Level of Evidence = D Theoretically, taking red yeast rice in combination with high-dose niacin might increase the risk of rhabdomyolysis.  Details Red yeast rice contains varying levels of the statin drug lovastatin and has been linked to reports of myopathy (9587,15017). Niacin has been reported to increase the risk of rhabdomyolysis when used in combination with lovastatin (104951).

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ANTICOAGULANT/ANTIPLATELET DRUGS Interaction Rating = Minor Be watchful with this combination. Severity = Moderate •  Occurrence = Unlikely •  Level of Evidence = B Concomitant use of tocotrienols with anticoagulant or antiplatelet agents might increase the risk of bleeding. However, this has not been reported in humans.  Details Taking tocotrienols orally inhibits experimentally-induced platelet aggregation in humans (3237,104429). Theoretically tocotrienols might increase the risk of bleeding if taken with antiplatelet or anticoagulant drugs. However, tocotrienols 400-800 mg daily have been used with aspirin and/or clopidogrel for 1 year with no clear cumulative antiplatelet effects and no reports of bleeding (104429).

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General ...Orally, artichoke extract seems to be well tolerated.
Most Common Adverse Effects:
Orally: Abdominal pain, diarrhea, flatulence, hunger, and nausea.
Topically: Contact dermatitis in sensitive individuals.
Serious Adverse Effects (Rare):
Orally: Anaphylaxis to artichoke inulin has been reported in individuals sensitive to inulin.
Topically: Chest tightness, cough, and dyspnea after occupational exposure in sensitive individuals.

Dermatologic ...Artichoke can cause an allergic reaction in some patients. Patients sensitive to the Asteraceae/Compositae family may be at the greatest risk. Members of this family include ragweed, chrysanthemums, marigolds, daisies, and many other herbs. Topically, allergic contact dermatitis can occur with the use of artichoke. This has been attributed to the constituent cynaropicrin (11,52206,52226,52230). Redness in the face (11774) and sweating (91475) have been reported rarely following oral use of artichoke extract.
Occupational or airborne exposure to artichoke may also cause allergic reactions. In one case, a 52-year-old male presented with severe spongiotic dermatitis in exposed areas that was recurrent over the past 8 years. A patch test confirmed allergies to artichokes and sesquiterpene lactones, a group of allergens from the Compositae family, and the patient confirmed occupational and airborne exposure to artichokes during the time of his symptoms. The patient improved considerably after treatment with dupilumab (111565).

Gastrointestinal ...Orally, artichoke extract might increase abdominal discomfort, flatulence, diarrhea, hunger, and nausea in some patients (2562,52238,91475). Abdominal pain and a bitter taste in the mouth were reported by a single person following oral use of a dietary supplement containing artichoke extract, as well as red yeast rice, pine bark extract, and garlic extract (89452). It is not clear if this adverse effect was due to artichoke, other ingredients, or the combination.
In one case report, the autopsy of an 84-year-old female revealed a colonic bezoar comprised of artichoke fiber and fragments. This bezoar caused complete intestinal obstruction, leading to fatal acute peritonitis. Although rare, patients who lack adequate teeth and/or who have a history of gastric surgery are at increased risk for fibrous bezoar formation (97716).

Pulmonary/Respiratory ...Following occupational exposure, allergic symptoms including dyspnea, cough, chest tightness, and asthma symptoms or exacerbation have been reported. The effects were attributed to sensitization to artichoke. Subsequent nasal challenge with artichoke extract caused reduced nasal patency in these patients (52210,52230).
Orally, severe anaphylactic shock in response to artichoke inulin as an ingredient in commercially available products has been reported (52217). Individuals with a noted sensitivity to artichokes should consume inulin with caution. While rare, individuals with a known inulin allergy should avoid artichoke and artichoke extract.

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General ...Orally, red yeast rice seems to be well tolerated.
Most Common Adverse Effects:
Orally: Abdominal discomfort, diarrhea, dizziness, flatulence, headache, heartburn, myopathy, and nausea.
Serious Adverse Effects (Rare):
Orally: There have been reports of hepatotoxicity and rhabdomyolysis, likely related to the lovastatin content of red yeast rice. Contaminated red yeast rice might cause renal toxicity.

Cardiovascular ...Orally, red yeast rice used in combination with other natural ingredients, such as green tea extract and policosanol, has been associated with a case of chest pain and a case of tachycardia requiring hospitalization, in post marketing surveillance (94001).

Dermatologic ...Orally, red yeast rice has been rarely associated with mild cases of pruritus and rash in clinical trials and post marketing surveillance (70531,94001,95664). Two cases of alopecia were reported in patients taking red yeast rice in clinical research (17089).

Gastrointestinal ...Orally, red yeast rice has been associated with mild adverse effects including abdominal discomfort, bloating, heartburn, flatulence, diarrhea or loose stools, nausea, vomiting, abdominal distention or pain, and reduced appetite, in clinical trials and post marketing surveillance (2624,6988,16836,70556,94001,95664). Taking red yeast rice with food may reduce the risk of heartburn, gas, and abdominal discomfort.

Genitourinary ...Orally, red yeast rice has been associated with rare reports of erectile dysfunction (70520). In one case report, a 39-year-old male developed erectile dysfunction after taking red yeast rice for one week. The dysfunction resolved after discontinuation of red yeast rice (98822).
A case of cystitis has been reported in a patient taking a specific combination product (Limicol, Laboratoire Lescuyer) containing red yeast rice extract, sugar cane extract, dry artichoke leaf extract, dry garlic extract, pine bark extract, vitamin E, riboflavin, and inositol hexanicotinate (89451). However, it is unclear if this event was associated with red yeast rice or other ingredients in the supplement.

Hepatic ...Orally, red yeast rice preparations have been linked to case reports of hepatotoxicity, including increased liver enzymes and acute hepatitis (16654,54477,94001,95664,98822,112644). Since red yeast rice often contains significant concentrations of the statin-like monacolin constituents, including lovastatin, it has the potential to cause similar side effects, including elevated liver enzymes. Clinical trials have shown that red yeast rice intake is associated with mild increases in levels of aspartate aminotransferase (AST) and alanine aminotransferase (ALT), which suggests possible liver damage (42692,70491,70513,70531,70547,107952). A case report describes a 62-year-old female who developed mixed hepatocellular and cholestatic hepatitis while taking red yeast rice. Signs and symptoms included fever, dark colored urine, weight loss, hyperbilirubinemia, and elevated ALT levels, all of which resolved after stopping red yeast rice (112089). A small study in various patient populations shows that taking a specific combination product (Armolipid Plus, Rottapharm S.p.A.) containing red yeast rice, berberine, policosanol, and other ingredients modestly increases levels of ALT, but not AST (107953). Clinical reviews of red yeast rice products show the risk of liver injury is comparable to the placebo or active control group, including pravastatin or lovastatin, when taken for up to 24 weeks (95664,95666).

Immunologic ...In one case report, a 58-year-old male presented with complaints of chronic dysphagia from eosinophilic esophagitis 12 months after starting an oral red yeast rice supplement (Artechol) containing monacolin K. Eosinophilic esophagitis resolved after cessation of red yeast rice (104465).
Inhalation of red yeast rice powder has resulted in one case of anaphylaxis (6997).

Musculoskeletal ...Orally, red yeast rice preparations have been linked to cases of myalgia, muscle spasm, rhabdomyolysis, and myopathy (9587,15017,16654,16834,16836,17089,70475,94001,95664,98822)(103311,112644,112645). Also, elevated creatine kinase levels up to 10 times normal, suggesting muscle injury and inflammation, have been reported in clinical and post-marketing research reports (6988,9587,15017,42692,70530,70567,94001,95664). The risk of muscle injury with red yeast rice seems to be similar to that with statins. In a small 3-month clinical trial in patients with previous statin intolerance, the rate of therapy discontinuation due to myalgia was similar between patients taking a specific red yeast rice product (Red Yeast Rice, Sylvan Bioproducts) 2400 mg twice daily (containing a daily dose of about 10 mg lovastatin) and patients taking pravastatin 20 mg twice daily (17089). However, in one case report, a 53-year-old patient experienced myalgia after 4 months of taking a red yeast rice product containing 4-8 mg lovastatin. Another case report describes a 50-year-old female who developed generalized myalgias and rhabdomyolysis, with elevated creatine phosphokinase, lactate dehydrogenase, and myoglobin levels, while taking red yeast rice (112306). The risk of myopathy seems to depend on the specific red yeast rice formulation and dose used (95903).

Neurologic/CNS ...Orally, red yeast rice has been associated with dizziness, headache, fatigue, and tingling in the extremities (6988,16836,17089,18110,94001). A case of peripheral neuropathy occurred in a 60-year-old male with a gastrointestinal tumor who was taking imatinib 400 mg daily along with red yeast rice for 3 years (89453). Three months after cessation of red yeast rice, symptoms resolved.

Ocular/Otic ...Orally, red yeast rice in combination with policosanol has been associated with one post-marketing report of hazy vision (94001).

Renal ...Orally, red yeast rice contaminated with citrinin may cause renal toxicity. Analyses of red yeast rice products have found that about one-third to two-thirds of these products contain citrinin (9588,17501,95666). Citrinin is a nephrotoxin that results from incorrect rice fermentation processes (9588,17501,70543). In vitro and in animal research, citrinin has been reported to cause kidney damage (70482,70542,70540).

Other ...Orally, red yeast rice has been associated with rare cases of edema (70508,70520,70525).

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General ...Orally, tocotrienols appear to be well-tolerated. No adverse effects have been reported in clinical trials.
Most Common Adverse Effects:
Topically: Mild itching.

Dermatologic ...Topically, a cream containing 5% tocotrienols has been reported to cause mild itching in 7% of patients in one clinical study (99699). Contact dermatitis has been reported in 33% of patients using a cream containing vitamin E as a mixture of tocopherols and tocotrienols (4721). However, it is unclear if this effect resulted from tocopherols, tocotrienols, or the combination.

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