FDA warns consumers about caffeine powder. 

OPSS Hompage Button tall

Natural Medicines Homepage Button tall


DMAA list updated for April 2014

Fueling Performance Photo Campaign
Share photos of how you fuel your performance and be featured on our Facebook page!

Dietary supplement module
Earn continuing education credits (if eligible) for this two-hour online module.

Operation LiveWell

Performance Triad


HPRC's human performance optimization (HPO) website is for U.S. Warfighters, their families, and those in the field of HPO who support them. The goal is Total Force Fitness: Warfighters optimized to carry out their mission as safely and effectively as possible.


What’s a “thermogenic fat burner”?

    OPSS Answer

    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 19 May 2014

    Back to Weight Loss FAQs