Thiago Braz, Rio 2016 Olympic Champion in pole vaulting, is provisionally suspended for the presence or use of ostarine glucuronide or ostarine, according to the Athletics Integrity Unit. Ostarine, a selective androgen receptor modular that can help muscle growth, is listed as a banned anabolic agent by the World Anti-Doping Agency. Provisional suspensions can be issued while awaiting a hearing on charges to determine an official punishment, if any. A positive test for ostarine can mean a ban of up to four years.