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Evidence-Based Supplement Research
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Black Cumin and Improved Insulin Sensitivity

Research synthesisLow evidenceMixed effect size3 studies · 3 beneficial · 0 neutral · 0 harmful

Across 3 studies, all reported beneficial effects on insulin sensitivity, with effect sizes ranging from small to moderate. The highest-quality evidence comes from a meta-analysis (82 RCTs, n=5026) showing moderate-sized improvements, with a tested dose range of 200–4600 mg/day over 7 days. The evidence base is small and overwhelmingly positive, which may reflect publication bias.

  • Effective dose range: 200 to 4600 mg/day
  • Studied populations: individuals with type 2 diabetes (T2DM)

Caveats: Evidence base is small (only 3 studies) — conclusions should be considered preliminary. 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). The median study duration is only 7 days (based on 1 study), which is too short to assess long-term effects on insulin sensitivity.

Generated May 13, 2026
Doses used in studies
  • mg/day: 200–4,600 (median 2,400, IQR 200–4,600) — 1 study
Time to effect
Median: 7 days · IQR 7 days–7 days · Range 7 days–7 days — Reported in 1 of 3 studies
Safety in these studies
3 of 3 papers
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