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 7 studies on rice bran for Reduced Blood Cholesterol — overall evidence strength: High.
Across 7 studies, 6 reported beneficial effects of rice bran on reducing blood cholesterol, with effect sizes ranging from small to large. The predominant effect size was moderate, with statistically significant reductions in total cholesterol observed in meta-analyses (e.g., -13.594 mg/dL and -11.80 mg/dL). Most evidence comes from clinical populations (e.g., metabolic syndrome, overweight/obese adults) at doses around 30 g/day (as rice bran oil), and effects were typically observed over 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.