Skip to main content
Evidence-Based Supplement Research
Evidence-Based Supplement Research
Pillser
Search
Sign UpLog In

Black Cumin and Reduced Waist Circumference

Research synthesisModerate evidenceMixed effect size3 studies · 2 beneficial · 1 neutral · 0 harmful

Across 3 studies (2 beneficial, 1 neutral), Black Cumin supplementation shows moderate evidence for reducing waist circumference, with effect sizes ranging from small to moderate. The most comprehensive evidence comes from a meta-analysis of 82 RCTs (200–4600 mg/day) reporting moderate beneficial effects. Median study duration was 56 days (8 weeks), and effects were observed in general and clinical populations (coronary artery disease), but not in adolescents with PCOS.

Caveats: Evidence base is small (only 3 studies) — conclusions should be considered preliminary. The one neutral study was in adolescents with PCOS, suggesting potential population-specific lack of effect. Doses varied widely (1–4.6 g/day) with no clear convergence on an optimal dose.

Generated Jul 16, 2026
Doses used in studies
  • mg/day: 200–4,600 (median 1,700, IQR 400–3,700) — 2 studies
  • g/day: 2 (median 2, IQR 2–2) — 1 study
Time to effect
Median: 8 weeks · IQR 4.5 weeks–2.8 months · Range 7 days–3.7 months — Reported in 3 of 3 studies
3 of 3 papers
Back to top