Have any supplements been studied for obesity?

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    Last Updated: May 16, 2025

    Many dietary supplements — including chitosan, glucomannan, and conjugated linoleic acid — have been studied for weight loss, and a reduction of 1 to 1.9 kilograms was reported in a meta-analysis of 67 trials. Other commonly studied ingredients include green tea extract, green coffee extract, bitter orange, and Garcinia cambogia, though evidence regarding their effectiveness is limited.

    Many dietary supplements and dietary ingredients have been studied for weight loss. In a recent meta-analysis of 67 randomized trials, the dietary ingredients chitosan, glucomannan, and conjugated linoleic acid were shown to help reduce weight by 1–1.9 kilograms. Other ingredients commonly studied for weight loss include green-tea-extract, green-coffee-extract, bitter orange, and Garcinia cambogia. Evidence about their effects is limited.[1]

    Have any supplements been studied for obesity? - Examine