Amir Khan had been banned from boxing for two years after failing a drug test following his defeat by Kell Brook last year.
Khan was stopped in the sixth round of his grudge fight with bitter rival Brook 14 months ago in what proved to be his final professional bout. Khan, 36, announced his retirement shortly after the defeat but it has now been revealed he failed a drug test which was carried out shortly after the final bell.
The former world champion tested positive for the banned substance ostarine which can be found in supplements and which can aid muscle growth. Khan was made aware of the failed test last April before being charged two months later.
The fighter accepted the presence of the substance but insisted he had ingested it accidentally. His case was then heard earlier this year with a decision reached in February that Khan had not intentionally cheated.
A statement from UK Anti-Doping read: "Professional boxer and Olympic medallist Amir Khan has been banned from all sport for two years following Anti-Doping Rule Violations (ADRVs) for the presence and use of a Prohibited Substance.
"On February 19, 2022, UK Anti-Doping (UKAD) collected an In-Competition urine Sample from Mr Khan after his fight against Kell Brook at the Manchester Arena. Mr Khan's Sample returned an Adverse Analytical Finding (AAF) for ostarine.
"Ostarine is a selective androgen receptor modulator (SARM). The substance is listed on the World Anti-Doping Agency's (WADA) 2022 Prohibited List as an anabolic agent and is prohibited in sport at all times."
