Research synthesisHigh evidenceModerate effect5 studies · 5 beneficial · 0 neutral · 0 harmful
Across 5 studies, all 5 reported beneficial effects of rice bran supplementation on reducing LDL cholesterol, with predominantly moderate effect sizes. The most robust evidence comes from two meta-analyses (n=1255 and n=572) showing LDL reductions of approximately 14-15 mg/dL. Effects were typically observed at doses around 30 g/day, and the median study duration was 56 days (8 weeks) among the one study that reported duration, suggesting benefits manifest within several weeks of consistent use.
- Effective dose range: ~30 g/day
- Studied populations: adults with metabolic syndrome or overweight/obesity
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). Most studies focused on rice bran oil rather than whole rice bran or other forms, so findings may not generalize to all rice bran supplements. The evidence base includes only 5 studies, with one providing limited detail on effect size and population.
Generated Jul 12, 2026