OPSS.org (Operation Supplement Safety) provides information about the safety and effectiveness of specific dietary supplements, with a focus on avoiding health risks and on issues important to members of the armed forces.
The U.S. Department of Defense (DoD) publishes the website and explains how it develops website content.
Information includes an A-Z Index discussing the safety and effectiveness of common supplement ingredients and types of supplements (such as energy drinks and weight-loss supplements); Check Your Supplement, a tool for screening a product for safety; a list of ingredients that service members may not use; and the opportunity to Ask the Expert questions by email.
Reviewed October 2025