Know your numbers and heart risk before you buy, and tell your doctor what you plan to take. The evidence below mostly measures LDL cholesterol, not heart attacks or strokes. Red yeast rice can act like a prescription statin, with the same risks.
- Plant sterols and stanols: a meta-analysis of 124 studies found that 0.6 to 3.3 g a day lowered LDL cholesterol by 6% to 12% on average. The effect levelled off at about 3 g. The FDA allows a heart-health claim for foods providing at least 1.3 g of plant sterol esters (or 3.4 g of stanol esters) a day, eaten in two servings with meals.
- Psyllium: trials using a median of about 10 g a day lowered LDL by about 0.33 mmol/L (roughly 13 mg/dL). The FDA's heart-health claim is based on at least 7 g a day of soluble fibre from psyllium husk. See our psyllium husk page.
- Omega-3 (EPA and DHA): these lower triglycerides, not LDL. The American Heart Association says 4 g a day of prescription omega-3 cuts very high triglycerides by 30% or more, but EPA+DHA can raise LDL in that group. More on our omega-3 page.
- Bergamot: a 2022 network meta-analysis ranked it among the most effective nutraceuticals for LDL, but the evidence came from small studies.
Red yeast rice can contain monacolin K, which is chemically identical to the statin drug lovastatin. According to NCCIH:
- The FDA treats products with meaningful amounts as unapproved drugs, not supplements. In one warning letter, an FDA-tested product contained about 14 mg of lovastatin per capsule.
- Amounts vary widely. Across 26 US brands, monacolin K ranged more than 60-fold, and no label stated it.
- Products with real monacolin K carry statin-type risks, including muscle, kidney and liver damage, plus statin-type drug interactions.
- Some products contain citrinin, a kidney toxin.
- It is not recommended in pregnancy or while breastfeeding.
In 2024, specific red yeast rice ("beni-koji") products in Japan were linked to kidney injury. A national survey described 192 patients, and most still had reduced kidney function at follow-up.
- Red yeast rice with no independent testing for monacolin and citrinin.
- Taking red yeast rice alongside a statin or other interacting medicines without your doctor's agreement.
- Fish oil labels that list total oil but not EPA and DHA.
- Proprietary blends that hide doses.
Plant sterols and psyllium have the most consistent LDL evidence and fewest safety concerns. Recheck your cholesterol after starting any product.
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