What happened?
On Friday, 23 October, the Athletics Integrity Unit (AIU) — the independent body that handles doping cases in athletics — announced that Jepchirchir had been provisionally suspended.
The AIU said an out-of-competition sample collected in Kenya returned an "adverse analytical finding" for EPO. It has not said exactly when the sample was taken, only that it was before the Sydney Marathon, which she won on 30 August in 2 hours 18 minutes 31 seconds.
What is EPO?
EPO (erythropoietin) is a hormone the body makes naturally to produce red blood cells, which carry oxygen. Taken as a drug, it lets an athlete's blood carry more oxygen, so they can run harder for longer. That makes it one of the most powerful — and most banned — drugs in endurance sport.
Who is Peres Jepchirchir?
At 33, she is one of the greatest marathon runners of her generation:
- Olympic champion — gold in the marathon at the Tokyo Olympics (held in 2021).
- World champion — marathon gold at the 2025 World Championships.
- Four World Marathon Majors: New York (2021), Boston (2022), London (2024) and Sydney (2026).
- Former half marathon world record holder.
What did she say?
A statement issued through her agent, Gianni Demadonna, said she "feels terrible about what happened" and that an athlete who uses performance-enhancing drugs should be disqualified.
The Sydney Marathon organisers said they were "extremely disappointed" and that their "commitment to clean sport is unwavering." For now, her Sydney win still stands.
What happens next?
A provisional suspension means she cannot compete while the case is decided. From here, she can:
- Ask for her "B" sample — the second half of the same sample — to be tested.
- Present her explanation to the AIU, and have the case heard by an independent disciplinary tribunal.
If the violation is confirmed, the standard ban for a substance like EPO is four years under the World Anti-Doping Code, though the length can change depending on the circumstances. Results from the affected period, including Sydney, could also be wiped out.
Why it matters for Kenya
Kenya produces more of the world's top distance runners than almost any other country — and has one of the worst doping records. More than 140 Kenyan athletes have been suspended or banned by the AIU since it was set up in 2017, including women's marathon world record holder Ruth Chepngetich, who received a three-year ban.
The timing is awkward: Nairobi will host the 2029 World Athletics Championships, and the World Anti-Doping Agency (WADA) visited Kenya earlier this month. "We are in shock, especially in the calibre of Peres Jepchirchir after a stellar career," said Barnabas Korir, a senior official of Kenya's Olympic committee.
Sources: AFP via France 24 (23 Oct 2026), ABC News Australia (24 Oct 2026) and World Track. A provisional suspension is not a finding of guilt; we will update this page when the case is decided.
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