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U.S. Air Force Airman 1st Class Yuyi Jiang, 86th Dental Squadron dental assistant technician, showcases a common type of supplement at Ramstein Air Base, Germany, Sept. 13, 2017. Operation Supplement Safety (OPSS) is a Department of Defense (DOD) dietary supplement resource for the military community, leaders, healthcare providers and DOD civilians. OPSS has an official published list of dietary supplement "ingredients" currently prohibited by the DOD, which service members can find on the OPSS website. (U.S. Air Force photo by Senior Airman Savannah L. Waters)