Big effect
Flaxseed supplementation linked to a large drop in body weight in a meta-analysis of diabetics — but the evidence behind that number is surprisingly thin.
This finding suggests flaxseed may help with weight loss in type 2 diabetes, but with only four studies backing it and half of them showing no effect, the picture is far from settled.
A meta-analysis of 1,136 people with type 2 diabetes found that flaxseed supplementation led to a statistically significant and large reduction in body weight, along with decreases in waist circumference and triglycerides. However, the same analysis found no effect on body mass index, blood pressure, or cholesterol levels, and the overall quality of the evidence was rated very low due to conflicting results across the few available studies.
Where this fits in the evidence
Pillser has synthesized 4 studies on flaxseed for Reduced Body Weight — overall evidence strength: Very low.
Across 4 studies, 2 reported beneficial effects on body weight, while 2 found neutral results, yielding a mixed evidence base. The top-quality meta-analysis in 1136 participants with type 2 diabetes showed a large beneficial effect (SMD 0.81), but a lower-quality systematic review in coronary artery disease found no significant weight change. The median study duration was 56 days, and the most commonly suggested dosing for benefit was ≥30 g/day for at least 12 weeks.
The study
- Meta-Analysis
- n = 1,136
- 2025-05
- Diabetes & metabolic syndrome
This is a plain-language summary of a research finding, not medical advice. Pillser surfaces research signals to help you decide what's worth investigating — always consult a qualified professional before changing what you take.