Across 3 studies, 1 reported a beneficial moderate-sized effect on reducing triglyceride levels, while 2 found neutral effects. The single beneficial study was a large meta-analysis (n=572) showing a statistically significant reduction of -15.13 mg/dL, but two other meta-analyses and RCTs did not find significant effects. The median study duration was 56 days (8 weeks), based on one study that reported duration.
Caveats: Evidence base is small (only 3 studies) — conclusions should be considered preliminary. Many of the included studies did not reach statistical significance — effect may be smaller than the predominant direction suggests.
rice bran consumption significantly reduced TG (-15.13 mg/dL; 95% CI: -29.56, -0.71)
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)