Research synthesisModerate evidenceModerate effect4 studies · 4 beneficial · 0 neutral · 0 harmful
Across 4 studies, all 4 reported beneficial moderate-sized effects of rice bran supplementation on reducing LDL cholesterol, with statistically significant reductions observed in each study. The predominant effect size is moderate, with LDL reductions ranging from approximately 14.6 to 15.1 mg/dL in meta-analyses. Effects were studied primarily in adults with metabolic syndrome or overweight/obesity, at doses around 30 g/day, and the only study reporting duration showed effects at 8 weeks.
- Effective dose range: About 30 g/day
- Studied populations: Adults with metabolic syndrome, overweight/obese adults
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. Most studies used rice bran oil or whole rice bran; effects may vary by form, but data insufficient to differentiate.
Generated May 15, 2026