Research synthesisHigh evidenceModerate effect7 studies · 6 beneficial · 1 neutral · 0 harmful
Across 7 studies, 6 reported beneficial moderate-sized effects of rice bran supplementation on reducing blood cholesterol, with 6 reaching statistical significance. Effects were observed at doses around 30 g/day (most commonly as rice bran oil), and median study duration was 56 days, indicating effects typically observed at 8 weeks. The evidence primarily comes from clinical populations, including individuals with metabolic syndrome, coronary artery disease, or overweight/obesity.
- Effective dose range: approximately 30 g/day
- Studied populations: clinical populations (metabolic syndrome, coronary artery disease, 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). One meta-analysis (2023) found no significant effect on total cholesterol, introducing some uncertainty. Most studies used rice bran oil rather than whole rice bran, and the effect may be form-dependent.
Generated Jun 12, 2026