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Evidence-Based Supplement Research
Evidence-Based Supplement Research
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flaxseed and Reduced Body Mass Index

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

Across 3 studies (two meta-analyses and one review), 2 reported neutral effects and 1 reported a small beneficial effect on BMI. The beneficial effect was observed with flaxseed supplementation ≥30 g/day for at least 12 weeks. Most evidence comes from clinical populations (type 2 diabetes, coronary artery disease).

  • Effective dose range: ≥30 g/day
  • Studied populations: people with type 2 diabetes and coronary artery disease

Caveats: Evidence base is small (only 3 studies) — conclusions should be considered preliminary. Additionally, only 1 of the 3 studies reached statistical significance, suggesting the effect may be smaller than the beneficial direction indicates. The beneficial finding comes from a low-quality review; higher-quality meta-analyses did not find significant effects.

Generated Jul 10, 2026
Doses used in studies
  • g/day: 30 (median 30, IQR 30–30) — 1 study
3 of 3 papers
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