Kenyan Marathon Champion Emmanuel Kemboi Banned for Doping
Kenyan long-distance runner Emmanuel Kipchumba Kemboi has been banned from athletics for two years after being found guilty of using a banned drug.
The Athletics Integrity Unit (AIU) confirmed that Kemboi violated anti-doping rules and has also canceled all his performances since October 2024.
In an official statement, the AIU announced that Kemboi tested positive for triamcinolone acetonide, a strong synthetic steroid that is commonly used to treat skin disorders, inflammation, and allergies.
Although he won a major marathon just over two months ago, this banned substance was found in his system during a doping test.
“The AIU has banned Emmanuel Kipchumba Kemboi (Kenya) for 2 years from April 7, 2025, for the presence/use of a prohibited substance (triamcinolone acetonide),” the AIU said in its release.
Kemboi’s violation was detected after he submitted a urine sample following his participation in the Lisbon Marathon in 2024.
Laboratory tests found that the sample contained triamcinolone acetonide, a drug that is listed under the World Anti-Doping Agency (WADA)’s 2024 list of prohibited substances.
It falls under the S9 category, which includes glucocorticoids—substances that are banned during competitions when taken via injection, orally, or through rectal use.
Due to this violation, Kemboi’s results from October 6, 2024, onwards have been nullified. This means he will lose any titles, medals, cash prizes, appearance fees, and any points he earned in competitions since that date.
Interestingly, Kemboi had recently made headlines for winning the Riyadh Marathon in Saudi Arabia on February 8, 2025.
He clinched the title in a tightly contested race, beating his Ethiopian rival by just three seconds. However, this victory has now been stripped from him.
The AIU stated that Kemboi accepted the punishment and agreed not to challenge the decision in a disciplinary hearing. This means he waived his right to a tribunal hearing and accepted full responsibility for his actions.
Kemboi’s case follows closely after the ban of another Kenyan runner, Brimin Kipkorir, who received a four-year suspension after testing positive for two banned drugs—furosemide and erythropoietin (EPO).
Kipkorir was tested during a routine doping control on November 22, 2024, while he was in Kenya. His urine sample was sent to a WADA-accredited lab in Lausanne, Switzerland.
Within three weeks, test results confirmed the presence of furosemide, a diuretic commonly used for treating kidney-related issues by helping the body get rid of extra fluid and salt.
However, in the sports world, this drug is sometimes misused for rapid weight loss or to mask the use of other drugs.
Later, in February 2025, further analysis of Kipkorir’s sample uncovered another banned substance—erythropoietin (EPO). EPO is used medically to treat kidney failure and anemia, but some athletes abuse it to increase the oxygen-carrying capacity of red blood cells, which greatly enhances endurance and performance.
The banning of both Kemboi and Kipkorir within such a short period has raised concerns over the rising number of Kenyan athletes involved in doping scandals. Despite continuous warnings and education efforts by WADA and the Anti-Doping Agency of Kenya (ADAK), cases of doping violations seem to be increasing.
These recent developments serve as a clear reminder of the growing challenge of doping in athletics and the urgent need for stricter enforcement and better education for athletes.
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