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British sprinter CJ Ujah’s B sample has tested positive, which confirms the positive A sample test result from the Tokyo Olympic Games.

The 27-year-old was a member of the British men’s 4x100m relay team which won the silver medal.

The team will likely now lose the medal. This is another hit to the turmoil-laden British team’s reputation after winning no gold medals in Tokyo.

Ujah was provisionally suspended when a test at the Games resulted in him testing positive for Ostarine and S-23.

The case has now been referred to the Court of Arbitration for Sport, which will decide on whether the British relay team, which includes Richard Kilty, Zharnel Hughes, and Nethaneel Mitchell-Blake, will be disqualified.

What are Ostarine and S-23?

Ostarine is an investigational drug that has not been approved by the US Food and Drug Administration (FDA). It is in a class of drugs called selective androgen receptor modulators (SARMs). Some supplement companies have included Ostarine in some products. The FDA considers supplements that contain Ostarine to be illegal.

S-23 is also an investigational SARM. It was developed by GTX, Inc as a male hormonal contraceptive. It binds to the androgen receptor better than older drugs such as Andarine and in animal studies, it showed both a strong ratio of anabolic to androgenic effects and dose-dependent suppression of spermatogenesis with spontaneous recovery after cessation of treatment.

Both are used to improve athletic performance and Ostarine also for weight loss. There is little scientific research on these products.

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