Study Shows No Significant Evidence for the Efficacy of Herbal, Dietary Weight Loss Supplements

An evaluation of randomized placebo-controlled trials means that using natural and dietary dietary supplements for weight reduction can’t be justified primarily based on the out there proof. Presented on the European Congress on Obesity, the evaluation consists of information from 121 trials with almost 10,000 grownup members.

The findings point out that though some natural and dietary dietary supplements present statistically higher weight reduction than placebo, it isn’t sufficient to profit well being, in keeping with the examine authors. Further, the investigators name for extra analysis into their long-term security of those dietary supplements.

“Over-the-counter natural and dietary dietary supplements promoted for weight reduction are more and more well-liked, however in contrast to pharmaceutical medication, medical proof for his or her security and effectiveness will not be required earlier than they hit the market”, stated dietitian Erica Bessell, PhD candidate on the University of Sydney, in a press launch. “Our rigorous evaluation of the very best out there proof finds that there’s inadequate proof to suggest these dietary supplements for weight reduction. Even although most dietary supplements seem secure for brief time period consumption, they don’t seem to be going to supply weight reduction that’s clinically significant.”

The researchers did a scientific overview of 54 randomized trials evaluating the impact of natural dietary supplements to placebo on weight reduction as much as August 2018, adopted by a scientific overview as much as December 2019 of 67 randomized trials. Of the 14 dietary supplements analyzed, solely 4 resulted in a statistically vital improve in weight reduction, and none resulted in clinically vital weight reduction (5.5 lbs or higher).

Some dietary dietary supplements, together with modified cellulose—plant fibre that expands within the abdomen to induce a sense of fullness—and blood orange juice extract, confirmed promising outcomes. However, these have been solely investigated in 1 trial and extra proof is required earlier than recommending them for weight reduction, in keeping with the examine authors.

“Herbal and dietary dietary supplements would possibly look like a quick-fix resolution to weight issues, however individuals want to concentrate on how little we truly learn about them,” Bessell stated, within the press launch. “Very few high-quality research have been carried out on some dietary supplements with little information on long-term effectiveness. What’s extra, many trials are small and poorly designed, and a few do not report on the composition of the dietary supplements being investigated. The large progress within the business and recognition of those merchandise underscores the urgency for conducting bigger, extra rigorous research to have cheap assurance of their security and effectiveness for weight reduction.”


Most complete research so far discover ‘inadequate proof’ to assist natural and dietary dietary supplements for weight reduction [news release]. EurekAlert; May 8, 2021. Accessed May 10, 2021.

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