What’s a “thermogenic fat burner”?
Dietary supplement products marketed as “thermogenic fat burners” purportedly reduce body fat by increasing the basal metabolic rate, whether you want to lose weight or get ripped. Such products primarily contain stimulants, which include caffeine (in various forms), synephrine, yohimbine, ephedra, and phenylethylamine. Caffeine is overwhelmingly the most common ingredient found in such supplements. For more information about thermogenic supplements, visit the OPSS FAQ about associated risks.
FAQ updated 25 February 2014.