Turkish weightlifter Sibel Ozkan has failed in a bid to clear her name after the Court of Arbitration for Sport (CAS) dismissed her appeal against a doping charge.
Ozkan was one of 45 athletes to fall foul of IOC rules earlier this year when she returned a positive urine sample showing the presence of banned substance stanozolol.
The 28-year-old had her results from the 2008 Beijing Olympics removed from the records, and she was ordered to return the silver medal she won in the -48kg category.
Ozkan appealed the decision to CAS, which has dismissed her case and upheld the IOC's original punishment.
A CAS statement read: "On 11 August 2016, the athlete filed an appeal at the CAS. The arbitration procedure was conducted by a sole arbitrator who found no reason to overturn the IOC Disciplinary Commission decision.
"The athlete's appeal has been dismissed and the decision taken by the IOC Disciplinary Commission on 21 July 2016 is confirmed.
"As a consequence, the results obtained by Sibel Ozkan Konak during the Beijing Olympiad, including her silver medal in the -48kg weightlifting event, are disqualified and the athlete must return her medal, pins and diploma."