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Evidence-Based Supplement Research
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Black Cumin and Reduced Postprandial Glucose

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

Across 3 studies, 1 reported a moderate beneficial effect of black cumin on reduced postprandial glucose, while 2 found neutral effects. The median study duration was 60 days (8.5 weeks). The most-studied dose range spans 200 to 4600 mg/day, with the only beneficial finding coming from a large meta-analysis of 5026 participants. Effects were predominantly neutral, with one moderate beneficial result.

  • Effective dose range: 200 to 4600 mg/day
  • Studied populations: general population (meta-analysis of 82 RCTs), type 2 diabetes patients, adolescent girls with PCOS

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. The only beneficial finding comes from a single meta-analysis; the two neutral studies targeted clinical populations (T2DM and PCOS), which may differ in response.

Generated May 18, 2026
Doses used in studies
  • mg/day: 200–4,600 (median 1,700, IQR 400–3,700) — 2 studies
Time to effect
Median: 8.5 weeks · IQR 4.8 weeks–2.9 months · Range 7 days–3.7 months — Reported in 2 of 3 studies
3 of 3 papers
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