OPSS’s mission is to provide the best evidence-based information about dietary supplements to Military Service Members, their families, healthcare providers, and leaders to achieve human performance optimization. Many Military Service Members use dietary supplements—for promoting health, improving performance, bodybuilding, losing weight, and more. Unfortunately, some supplements have resulted in adverse events that compromise rather than improve performance, and in some cases supplements result in positive drug tests. Our goal is to provide the tools and resources to help users make informed decisions about dietary supplements to reduce the potential risks to their health and careers.