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

Research synthesisVery low evidenceSmall effect3 studies · 1 beneficial · 2 neutral · 0 harmful

Across 3 studies on flaxseed for reduced body mass index, 1 reported a beneficial small effect, while 2 found neutral small effects. The only statistically significant finding comes from a review (not a controlled trial), and the highest-quality evidence (two meta-analyses) found no significant benefit in diabetic or coronary artery disease populations. Evidence is too limited to identify a consistent effective dose, form, or population.

  • Studied populations: patients with type 2 diabetes; patients with coronary artery disease

Caveats: Evidence base is small (only 3 studies) — conclusions should be considered preliminary. The only beneficial finding comes from a low-evidence-score review, while the two meta-analyses (higher quality) found no significant effect on BMI. Many of the included studies did not reach statistical significance — effect may be smaller than the predominant direction suggests.

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