What Supplements Can—and Cannot—Do for High Cholesterol
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In this clip from Q&A #78, Dr. Rhonda Patrick discusses supplements that can complement diet, exercise, and clinician-guided treatment for high cholesterol. Viscous soluble fiber has some of the strongest evidence. A meta-analysis of 181 randomized trials found an average LDL reduction of about 8.3 milligrams per deciliter, with each additional 5 grams per day associated with a reduction of about 5.6 milligrams per deciliter. Psyllium and oat or barley beta-glucan are among the better-supported options. [1]
Other supplements affect different parts of the lipid profile. EPA and DHA primarily lower triglycerides, while standardized garlic and berberine preparations have produced modest LDL reductions in short trials. Product, dose, and individual response matter. Red yeast rice lowers LDL through monacolin K, which is chemically identical to lovastatin, so it shares statin-related mechanisms and requires attention to potency, contamination, medicine interactions, and muscle or liver effects. [2] [3] [4] [5]
Niacin can lower triglycerides and LDL while raising HDL, but modern trials found that adding pharmacologic niacin to statin-based care did not improve cardiovascular outcomes and increased adverse effects. The most useful supplement strategy therefore begins with the size and type of lipid abnormality, overall cardiovascular risk, diet, medicines, and the reduction needed. Repeat testing can show whether a clinician-approved change is producing a meaningful response. [6] [7]
- ^ 10.1016/j.advnut.2023.01.005
- ^ Bhatt DL; Steg PG; Miller M; Brinton EA; Jacobson TA; Ketchum SB, et al. (2019). Cardiovascular Risk Reduction with Icosapent Ethyl for Hypertriglyceridemia. N Engl J Med 380, 1.
- ^ Stevinson C; Pittler MH; Ernst E (2000). Garlic for treating hypercholesterolemia. A meta-analysis of randomized clinical trials. Ann Intern Med 133, 6.
- ^ Blais JE; Huang X; Zhao JV (2023). Overall and Sex-Specific Effect of Berberine for the Treatment of Dyslipidemia in Adults: A Systematic Review and Meta-Analysis of Randomized Placebo-Controlled Trials. Drugs 83, 5.
- ^ Gerards MC; Terlou RJ; Yu H; Koks CH; Gerdes VE (2015). Traditional Chinese lipid-lowering agent red yeast rice results in significant LDL reduction but safety is uncertain - a systematic review and meta-analysis. Atherosclerosis 240, 2.
- ^ 10.1016/j.jacc.2013.06.051
- ^ 10.1161/circgen.117.001696
Dr. Rhonda Patrick: Julie asks whether a supplement can lower cholesterol without taking a statin, in addition to exercise.
I am not a physician, and this is not medical advice. High cholesterol can require medication, and a clinician should assess the person's LDL level, total cardiovascular risk, family history, and other health factors.
Lifestyle comes first. A Mediterranean-style dietary pattern, regular physical activity, reducing excess weight when present, and replacing some saturated fat with unsaturated fat can improve cardiovascular risk. Psychological stress can also affect sleep, diet, metabolism, and lipid measurements, although stress is not the only cause of high cholesterol.
Soluble fiber has some of the strongest supplement evidence. A large meta-analysis found that each additional 5 grams per day of soluble fiber lowered LDL cholesterol by about 5.6 milligrams per deciliter on average. Psyllium and viscous oat or barley beta-glucan can produce somewhat larger reductions at effective doses.
Fiber types are not interchangeable. Viscosity is important for LDL lowering. Psyllium, oat beta-glucan, and barley beta-glucan have better evidence than many highly fermentable fibers or mushroom beta-glucans.
Omega-3 fatty acids primarily lower triglycerides rather than LDL cholesterol. The relevant dose is the combined EPA and DHA amount, not total fish-oil weight. DHA-containing products can raise LDL in some people with high triglycerides, and prescription products are not interchangeable with over-the-counter supplements.
Garlic may produce a small LDL reduction, but results vary by preparation and study. Standardized garlic supplements can cause gastrointestinal effects and may increase bleeding risk.
Berberine has lowered LDL and triglycerides in short trials, but the evidence is less certain and product quality varies. It can cause gastrointestinal symptoms, lower glucose and blood pressure, and interact with medicines.
Certain probiotic strains have produced small lipid changes in short trials. The effect is strain-specific, and the evidence is not strong enough to recommend probiotics as LDL treatment.
Red yeast rice lowers LDL because monacolin K is chemically lovastatin. Product potency varies, and some products can contain the kidney toxin citrinin. Red yeast rice can therefore share statin-like muscle, liver, and drug-interaction risks while providing less reliable dosing.
Niacin can lower triglycerides and LDL, raise HDL, and lower lipoprotein(a). However, modern trials did not show added cardiovascular benefit on top of statin therapy and found important adverse effects. High-dose niacin should not be treated as a routine vitamin supplement.
If excess weight is present, sustained weight loss can improve triglycerides, blood pressure, glucose control, and overall cardiometabolic risk. LDL response varies, so lipid values should be rechecked rather than predicted.
Supplements can be adjuncts, but they do not replace indicated statins or other evidence-based medicines. A person who needs a large LDL reduction, has established cardiovascular disease, diabetes, familial hypercholesterolemia, or a high absolute risk needs clinician-directed treatment.
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