Big effect
Curcumin cut BMI by 0.69 kg/m² in type 2 diabetes patients — but only at doses above 1,000 mg/day and in a clinical population.
This is a moderately large effect for a supplement, but the evidence comes from a specific clinical group (type 2 diabetes), so results may not apply to people without the condition. Across 7 studies, most found a benefit, giving moderate confidence in the finding.
A meta-analysis of 699 adults with type 2 diabetes found that curcumin supplements reduced BMI by an average of 0.69 points, a modest but significant drop. The effect was stronger at doses over 1,000 mg per day. However, because all participants had type 2 diabetes, it's unclear if people without the condition would see the same benefit.
Where this fits in the evidence
Pillser has synthesized 7 studies on Turmeric for Reduced Body Mass Index — overall evidence strength: Moderate.
Across 7 studies, 5 reported beneficial effects of turmeric/curcumin on reducing body mass index (BMI), with a predominantly moderate effect size. The most common dose used was >1000 mg/day, and effects were observed mainly in clinical populations with type 2 diabetes or obesity. The median study duration was 91 days, suggesting consistent use over about 3 months may be needed.
The study
- Meta-Analysis
- n = 699
- 2025-11-10
- Nutrition reviews
- PubMed: 41211694
- DOI: 10.1093/nutrit/nuaf193
- Full study breakdown →
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.