Across 5 studies, 3 reported beneficial effects on triglyceride reduction, with effect sizes ranging from small to moderate. The highest-quality evidence comes from a 2024 meta-analysis (n=572) showing a moderate beneficial effect (-15.13 mg/dL; 95% CI: -29.56, -0.71). The most-studied dose is 30 g/day of rice bran oil, and effects were typically observed at 8 weeks (median study duration: 56 days).
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). Many of the included studies did not reach statistical significance — effect may be smaller than the predominant direction suggests. Evidence base is small (only 5 studies) — conclusions should be considered preliminary.
rice bran consumption significantly reduced TG (-15.13 mg/dL; 95% CI: -29.56, -0.71)
RBO significantly improved LVEF (51.34%) and reduced triglyceride (125.01 mg dl-1), blood sugar (110.4 mg dl-1), total cholesterol (123.01 mg dl-1) and low density lipoprotein (56.88 mg dl-1) levels compared to sunflower oil ((45.56%), (155.93 mg dl-1), (128.94 mg dl-1), (163.93 mg dl-1) and (83.79 mg dl-1), respectively) following a 8-week trial (P-values < 0.05).
no significant changes were noted in ... serum triglycerides
Meta-analysis of eight RCTs (with 11 effect sizes) showed no significant effect of rice bran supplementation on serum levels of triglyceride (WMD: -11.38 mg/dl; 95% CI: -27.73, 4.96; P = 0.17)
Our analysis revealed that the consumption of RBO significantly decreased ... TG (WMD: -9.19 mg/dL, 95% CI: -17.99, -0.38, P = 0.041) levels.