Red yeast rice
Metabolic Health · Natural monacolin K source
Tier C+
Bottom line
Read Off Label grades Red yeast rice as C+ (5.5/10) based on moderate evidence, moderate benefit magnitude, and a med-risk safety profile.
Monacolin K in red yeast rice is chemically identical to lovastatin; supplement products have less consistent dose and quality control than prescription formulations.
Studied, labeled, or reported-use context: 600-2400 mg/day standardized product — OTC; not individualized guidance.
What the evidence says
Monacolin K in red yeast rice is chemically identical to lovastatin; supplement products have less consistent dose and quality control than prescription formulations. EU 2022 limit makes supplements sold there largely inactive. Citrinin contamination is a product-quality variable that third-party testing can document.
Mechanism
Fermented rice contains monacolin K — chemically identical to prescription lovastatin; provides statin-equivalent LDL lowering at lower concentration
Studied, labeled, or reported dose & route
600-2400 mg/day standardized product
This records doses and routes described in studies, approved labeling, clinical practice, or documented use. It is not individualized guidance and does not establish safety; context changes with indication, formulation, health history, monitoring, and other medicines.
Citations
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Common questions
- What does the evidence show about Red yeast rice's effects?
- Read Off Label rates the evidence for Red yeast rice as Moderate and the benefit magnitude as moderate, producing an overall grade of C+ (5.5/10). Monacolin K in red yeast rice is chemically identical to lovastatin; supplement products have less consistent dose and quality control than prescription formulations.
- What safety findings are reported for Red yeast rice?
- Red yeast rice has a med risk profile in the database. Med (same side effect profile as low-dose lovastatin; contamination with citrinin — a nephrotoxic mycotoxin — is a recurring quality issue; EU capped monacolin K in supplements at 3 mg/day since 2022 effectively eliminating meaningful effect) Legal status: OTC (US; EU heavily restricted since 2022).
- What doses or routes are reported for Red yeast rice?
- 600-2400 mg/day standardized product This is context from studies, approved labeling, clinical practice, or documented use; it is not individualized guidance and does not establish safety.
- How does Red yeast rice work?
- Fermented rice contains monacolin K — chemically identical to prescription lovastatin; provides statin-equivalent LDL lowering at lower concentration
This is an independent synthesis of published research by a non-clinician. Scores are opinions supported by citations, not prescriptions. See the full disclaimer and methodology for how this score was produced and what it does and doesn't mean.