Dr. Sophia Yen, co-founder of Pandia Health and professor at Stanford Univeristy with a clinical focus on obesity, agrees that abdominal sweatbands don't really work — at least not long term. "I think it would work temporarily, but it wouldn't work long term," Yen says. "Anytime anything's about sweat, it's temporary."

Does wearing a sweat belt help lose belly fat?

Unfortunately, these sauna belts don't reduce belly fat. The theory of these sweat belts is that if you heat up your body you'll burn more fat, especially if you're exercising while wearing them, as most of these products advise.

Does sweating burn belly fat?

Can Sweating Burn Fat? Technically, no. You'll probably break a sweat during an intense fat-burning workout — but the sweat isn't the reason you burn fat. So even if you're sitting in a pool of your own sweat, that doesn't automatically mean you've just burned a ton of fat.