Research synthesisModerate evidenceLarge effect4 studies · 4 beneficial · 0 neutral · 0 harmful
Across 4 studies, all reported beneficial effects of red yeast rice on reducing blood cholesterol, with 3 out of 4 reaching statistical significance. The predominant effect size was large, as seen in two meta-analyses reporting mean reductions in total cholesterol of approximately 31–33 mg/dL. Most studies involved clinical populations (adults with dyslipidemia or hyperlipidemia) and doses ranged from 200 mg/day to 4800 mg/day; effects were typically observed at 8–12 weeks (median study duration: 70 days).
- Effective dose range: 200–4800 mg daily (as red yeast rice), or up to 10 mg/day of monacolin K
- Studied populations: adults with dyslipidemia or hyperlipidemia
Caveats: Available evidence is overwhelmingly positive — clinical literature in this area is subject to publication bias (null-result studies are less likely to be published or indexed). Evidence base is small (only 4 studies) — conclusions should be considered preliminary. Dose range is broad, and some studies did not specify the form or monacolin content, which may affect reproducibility.
Generated Jun 10, 2026