The FDA monitors but does not evaluate or test the claims of dietary supplement companies, which means these companies can make a lot of claims based on nothing or studies that are only semi-related to their product. There are hundreds of fat burners you can find online and some are more honest than others in their claims.The truth is, there is no guarantee the ingredients in fat burners will make you lose weight. However, there are studies that suggest most of the active ingredients in the fat burners we've included on our list will help promote weight loss when paired with other healthy habits like diet and exercise. If you are scouring the internet for a magic pill to lose weight and burn fat without putting in the work, it does not exist—and any company worth your time will inform you of this.