Resources to assist with evaluating Claims Made for Weight-Loss Products

It has been estimated that about 15 percent of adults in the U.S. have tried using a dietary supplement to achieve weight loss. An even more alarming trend is the risk for "tainted weight loss products", as indicated most recently by the U.S. Food and Drug Administration (FDA).

In addition to concerns regarding possible hidden or harmful ingredients which may be found in dietary supplements, claims that are made in the marketing of many of these over-the-counter products can be problematic. Scientific proof is required by law to support claims that are made and prior to the ad's commencement.

Among its many roles, the Federal Trade Commission (FTC) is charged with the task of protecting consumers from false or misleading advertising, including ads featuring weight loss products. Although dietary supplements intended for weight loss may be offered in the form of a tablet, capsule, powder or liquid, products advertised for weight loss may also include over-the-counter drugs and products rubbed into the skin or worn on the body.

In general, the claims the FTC has identified as being a concern center around "substantial weight loss", no matter how much is consumed and weight loss without modifying dietary intake or increasing physical activity. In other words, contrary to the advice provided by registered dietitian nutritionists when counseling patients and clients who want to lose weight.

Resources are available to aid both consumers and health professionals in evaluating claims made regarding weight loss products and their ingredients. In addition to the FTC and FDA websites, the National Institutes of Health's Office of Dietary Supplements and National Center for Complementary and Integrative Health offer information online. The scientific literature can also be searched using the PubMed database, and RDNs can enhance their knowledge of dietary supplements by consulting other resources, as indicated in the Guidance Regarding the Recommendation and Sale of Dietary Supplements.

References:

• National Institutes of Health, Office of Dietary Supplements. Dietary Supplements for Weight Loss – Health Professional. May 18, 2022. Accessed June 28, 2022.
• U.S. Food and Drug Administration. Tainted Weight Loss Products. March 22, 2022. Accessed June 28, 2022.
• Federal Trade Commission, Gut Check: A Reference Guide for Media on Spotting False Weight Loss Claims. January 2014. Accessed June 28, 2022.
• Federal Trade Commission, Consumer Advice. "The Truth Behind Weight Loss Ads" Accessed June 28, 2022.