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Evidence-Based Supplement Research
Evidence-Based Supplement Research
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Olive and Reduced Triglyceride Levels

Research synthesisLow evidenceModerate effect3 studies · 3 beneficial · 0 neutral · 0 harmful

Across 3 studies (2 RCTs, 1 narrative review), all reported beneficial effects of olive leaf extract on reducing triglyceride levels, with predominantly moderate effect sizes. Two of the three studies found statistically significant reductions, and effects were typically observed at 12 weeks (84 days) with doses ranging from 250 to 1000 mg/day. The evidence base is small, and findings come from specific populations including hypertensive adults and postmenopausal women.

  • Studied populations: hypertensive adults and postmenopausal women

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 3 studies) — conclusions should be considered preliminary. One study is a narrative review, which provides lower-quality evidence. Dose range varied considerably (250-1000 mg/day), and only two studies reported dose and duration.

Generated Jul 12, 2026
Doses used in studies
  • mg/day: 250–1,000 (median 625, IQR 437.5–812.5) — 2 studies
Time to effect
Median: 2.8 months · IQR 2.8 months–2.8 months · Range 2.8 months–2.8 months — Reported in 2 of 3 studies
Safety in these studies
3 of 3 papers
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