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Evidence-Based Supplement Research
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Cinnamon and Reduced Body Mass Index

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

Across 3 studies of cinnamon for reduced body mass index, 1 reported a moderate beneficial effect (≤2 g/day in adults with type 2 diabetes), while 2 found neutral effects. The median study duration was 57 days, and the most-studied population was clinical adults with type 2 diabetes. The evidence base is too small to draw firm conclusions on effect size or dose range.

  • Effective dose range: ≤2 g/day
  • Studied populations: adults with type 2 diabetes

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 beneficial effect was limited to a specific dose (≤2 g/day) and population (type 2 diabetes), and results were inconsistent for other groups (e.g., PCOS).

Generated Jul 5, 2026
Doses used in studies
  • mg/day: 600 (median 600, IQR 600–600) — 1 study
Time to effect
Median: 8.1 weeks · IQR 6.2 weeks–10.1 weeks · Range 4.3 weeks–2.8 months — Reported in 2 of 3 studies
Safety in these studies
3 of 3 papers
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