Class 4 Supplements
Class 4 supplements have low risk of adverse effects and only moderate potential benefits, placing them in the Yellow Zone.
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.
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.