Are resveratrol weight loss supplements a scam?

Resveratrol supplements are not subject to regulation by the FDA and have not undergone rigorous scientific testing for weight loss, according to WebMD. Most dosages of resveratrol supplements are far below the equivalent doses tested in animal studies,

As of 2015, few studies have been conducted on resveratrol supplements in humans, according to WebMD. A study of the effects of the supplement on mice found that mice who took resveratrol ran twice as far on a treadmill without muscle fatigue compared to unsupplemented mice, according to Fitness Magazine. This finding led to the theory that resveratrol stimulates sirtuins enzymes, but this claim has not been directly tested.