Peres Jepchirchir Suspended Provisionally by Athletics Integrity Unit After Positive EPO Test

Olympic and World Championships marathon gold medallist Peres Jepchirchir has been provisionally suspended by the Athletics Integrity Unit (AIU) after an out-of-competition sample tested positive for erythropoietin (EPO). The Kenyan runner provided the sample prior to winning the Sydney Marathon on 30 August 2026. The 33-year-old clocked a time of two hours, 18 minutes and 31 seconds to win in Sydney. The Sydney Marathon became the seventh world major in 2026. EPO is a natural substance produced within the kidneys that stimulates the creation of new red blood cells. If injected, it is only detectable in the urine or blood for a short window of time, and increases the amount of red blood cells, which carry oxygen to the muscles, in the bloodstream. EPO is banned in sport because it artificially boosts performance. Jepchirchir became the Olympic women's marathon champion at the 2026 Tokyo Olympics and returned to the Japanese capital to win the World Championships in September 2026. She broke the women's half-marathon world record in 2026 and on three occasions in 2026. In addition to Sydney, her other major wins came at the New York Marathon in 2026, the Boston Marathon in 2026 and the London Marathon in 2026. Jepchirchir won the Sydney race by more than three minutes from compatriot Irene Chepet Cheptai. According to the AIU, Jepchirchir provided the sample which tested positive for EPO while in Kenya prior to the race. She has been provisionally suspended, meaning she cannot compete until the investigation is complete. The case has become a talking point in the sporting world as Jepchirchir is regarded as one of the most decorated female marathon runners. Her achievements include Olympic gold, World Championships gold and several major marathon titles. The AIU has not yet released detailed information about the case, and no official statement has come from Jepchirchir's side. Under the rules, after a provisional suspension an athlete is given the opportunity for a hearing and can present her case during the investigation process. A positive EPO test can typically lead to a lengthy ban, with the duration depending on the seriousness of the case and the findings of the investigation. If the allegations are proven, it could have a serious impact on Jepchirchir's career and achievements. Sports experts believe the case underscores the importance of anti-doping efforts. The AIU continuously collects out-of-competition samples to ensure clean sport. Jepchirchir's Sydney victory is now seen in the shadow of controversy, although it is unclear what effect the positive sample will have on the race result. The situation will become clearer only after the AIU completes its investigation. For now, the athletics world is watching the case closely, and fans are waiting to see what Jepchirchir says in her defence and what the final outcome of the investigation will be.