New evidence
A meta-analysis tied rice bran to a 13.6 mg/dL drop in total cholesterol — but the evidence is only moderate and the optimal dose remains unknown.
This is the strongest signal so far that rice bran, a cheap and widely available byproduct, might meaningfully lower cholesterol, but with only 5 studies and no specified dose, it's not yet a slam dunk.
Pooling data from 1255 people across 5 studies, researchers found that rice bran supplementation lowered total cholesterol by an average of 13.6 mg/dL, a moderate and statistically significant reduction. However, the body of evidence is still moderate in strength, with mixed effect sizes across individual studies and no clear dosing guidelines — meaning it’s promising but not proven.
Where this fits in the evidence
Pillser has synthesized 5 studies on rice bran for Reduced Blood Cholesterol — overall evidence strength: Moderate.
Across 5 studies, 4 reported beneficial effects on reducing blood cholesterol, with effect sizes that are mixed (small to large). The highest-quality evidence (two meta-analyses) shows moderate reductions in total cholesterol (approximately 11–14 mg/dL). Effects are most studied at doses around 30 g/day of rice bran or rice bran oil, primarily in adults with metabolic syndrome or overweight/obesity. Median study duration was 56 days based on one trial, suggesting effects may appear within 8 weeks.
The study
- Meta-Analysis
- n = 1,255
- 2025-09-17
- International journal of molecular sciences
- PubMed: 41009614
- DOI: 10.3390/ijms26189051
- Full study breakdown →
This is a plain-language summary of a research finding, not medical advice. Pillser surfaces research signals to help you decide what's worth investigating — always consult a qualified professional before changing what you take.