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Evidence-Based Supplement Research
Evidence-Based Supplement Research
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Olive and Improved Quality of Life

Research synthesisModerate evidenceSmall effect3 studies · 2 beneficial · 1 neutral · 0 harmful

Across 3 randomized controlled trials, 2 reported beneficial small-sized effects on quality of life, while 1 reported neutral effects. The most-studied dose range was 250–1000 mg/day, and effects were typically observed at 8–12 weeks (median 84 days). Populations included clinical groups (hypertension, gastrointestinal discomfort) and postmenopausal women.

  • Effective dose range: 250–1000 mg/day
  • Studied populations: clinical (hypertension, gastrointestinal discomfort) and postmenopausal women

Caveats: Evidence base is small (only 3 studies) — conclusions should be considered preliminary. Effects were small and one study showed no benefit, suggesting the effect may be modest and population-specific. The beneficial studies used doses of 250 mg/day and 400 mg/day, while the neutral study used 1000 mg/day OLE in a different population (hypertension), and one beneficial study combined olive leaf extract with other ingredients, complicating attribution.

Generated Jul 12, 2026
Doses used in studies
  • mg/day: 250–1,000 (median 400, IQR 325–700) — 3 studies
Time to effect
Median: 2.8 months · IQR 10 weeks–2.8 months · Range 8 weeks–2.8 months — Reported in 3 of 3 studies
Safety in these studies
3 of 3 papers
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