Athletes are taking GLP-1s. Anti-doping regulators are watching

Stephanie ApsteinWashington Post·2 Oct, 2026 08:00 PM7 mins to readSerena Williams competed in women’s doubles alongside her sister Venus this month at the US Open. Photo / Getty ImagesSerena Williams competed in women’s doubles alongside her sister Venus this month at the US Open. Photo / Getty ImagesSerena Williams’ praise of weight-loss drugs highlights a debate playing out among researchers: Should the medications be banned for most athletes? Serena Williams has won 23 Grand Slam singles titles, has twice held all four major titles at once and inspired a generation of tennis players. It’s a run that,