Diet patches (also called weight loss patches) are like diet pills, but function like a nicotine patch; they release substances into the body that are said to speed up your metabolism and/or curb your appetite, both of which promote weight loss. Though the claims of their efficacy have not been evaluated by the FDA (Food and Drug Administration), most contain natural ingredients, and there have not been any recalls of diet patches.

On the Other: Many Unsafe Claims

The evidence seems to be stacked against diet-patch manufacturers. Consumers have complained of bogus marketing claims, fraudulent credit-card charges from diet-patch companies and a lack of results from using the product. The patch companies often tout the patches' ability to make the wearer lose more weight in a certain time period than is considered safe by most doctors. The patches' use and effectiveness hasn't undergone serious study.

Bottom Line

Always talk to your doctor before starting a weight-loss program. The patch ingredients may not be safe for people with certain conditions or taking certain medications, and your physician may discourage you from using the patch altogether based on the lack of research surrounding its use. If you do use it and it works, keep in mind that you may regain the weight you lost after you stop using the patch.

Source:

Los Angeles Times: Do diet patch claims stick?

Consumer Affairs: The Amazing Diet Patch

The Pink Patch: About Pink Patch

Resource:

Consumer Affairs: Feds Tackle Weight-Loss Patch Promoter