Does turmeric help with obesity? What the research does and doesn't show

A 2018 meta-analysis of 11 trials found curcumin supplementation reduced average body weight by about 1 kg and BMI by 0.48 versus placebo — real, but small, effects from a concentrated supplement, not turmeric tea, turmeric water or turmeric sprinkled on food, none of which any trial has tested for weight.

What the evidence doesn't support

It doesn't support turmeric tea, turmeric water, turmeric added to meals, or any culinary use of the spice as a way to lose weight — no trial has tested those forms. It doesn't support curcumin supplements as a weight-loss strategy on their own either: the effects found were small averages across groups, not a guarantee for an individual, and not a substitute for the basics of diet and activity.

What the trials found

A 2018 dose-response meta-analysis pooled 11 randomized trials, 876 people in total (53% women). Curcumin supplementation significantly reduced body weight by an average of 1.14 kg and BMI by an average of 0.48 kg/m2 versus placebo. There was no significant overall effect on waist circumference — except in a subgroup of trials using 1,000 mg or more of curcumin per day, for 8 weeks or longer, in people who were already overweight, where waist circumference did drop significantly.

A larger 2024 meta-analysis pooled 103 randomized trials and 7,216 people across 42 different health outcomes tied to curcumin. It rated body weight, alongside fasting blood sugar, CRP and HDL cholesterol, as a high-credibility finding — meaning the pooled evidence was judged reasonably solid. BMI and waist circumference were rated only moderate credibility. Even so, the authors flagged real limitations in trial design across the 103 studies and called for larger, longer, better-designed trials before treating any of these 42 outcomes as settled.

Neither review reports what turmeric tea, turmeric water, or turmeric used as a cooking spice would do — every trial behind both reviews used a standardized curcumin supplement, not the forms most searched for online.

Finding	Trials / people	Result
Body weight (2018 review)	11 trials, 876 people	-1.14 kg average vs. placebo
BMI (2018 review)	11 trials, 876 people	-0.48 kg/m2 average vs. placebo
Waist circumference (2018 review)	11 trials, 876 people	No overall effect; significant only at ≥1,000 mg/day, ≥8 weeks, overweight subjects
Body weight (2024 review)	103 trials, 7,216 people	Rated high-credibility, magnitude not restated here

Questions people ask

Can turmeric help you lose weight?

A concentrated curcumin supplement produced a small average weight and BMI reduction across pooled trials — around a kilogram, not a transformation. No trial tested turmeric tea, turmeric water, or turmeric used as a spice for this purpose.

Does turmeric tea help with weight loss?

No trial in either review tested turmeric tea specifically. The positive findings above come entirely from standardized curcumin supplements, which deliver a much more concentrated dose than a cup of turmeric tea.

How much turmeric should I take to lose weight?

The subgroup that showed a waist-circumference effect in the 2018 review used 1,000 mg or more of curcumin per day for at least 8 weeks, in people who were already overweight. That's a description of what one subgroup of trials used, not a recommended dose — see how much turmeric should you take a day for more on typical supplement amounts and how they compare to a culinary serving.

Which turmeric is best for weight loss?

Neither review compared different curcumin products or brands against each other, and no trial tested turmeric root powder at a culinary amount for weight. There's no research basis for ranking one product over another for this specific outcome.

When to talk to a doctor

Turmeric and curcumin are not a treatment for obesity, and the effects found above are small compared with what's typically achieved through diet and activity changes, or medical care when needed. If you're considering a supplement as part of a weight plan, or you're already on a medication that affects weight or blood sugar, talk to a doctor first.

Related reading: turmeric and diabetes: what the research does and doesn't show, turmeric and cholesterol: what the research does and doesn't show, and how much turmeric should you take a day.