Parsing Through the Health Fads at the Olympics Listen Download Embed Share Share this on Facebook (Opens in a new window) Share this on Twitter (Opens in a new window) Share this via Email A patient receives cupping treatment, a technique used by the likes of Michael Phelps, by Dr. Eason Yu Kin Cho at a Chinese medicine clinic on August 10, 2016 in Hong Kong. ( Lam Yik Fei / Getty ) Produced by PRI and WNYC