Clean Boxing Program: Clostebol, a Prohibited Substance

The World Boxing Council (WBC), in partnership with the Voluntary Anti-Doping Association (VADA), maintains a strict list of prohibited substances in its Clean Boxing Program (CBP). One of these is Clostebol, an anabolic steroid that, despite having medical uses, is banned in sports due to its performance-enhancing effects.

Clostebol is a derivative of testosterone and is classified as a synthetic anabolic agent. Medically, it’s used for treating skin wounds, muscle injuries, or hormonal deficiencies. However, in sports, it’s considered a form of doping.

The World Anti-Doping Agency (WADA) also includes Clostebol on its list of substances prohibited at all times, both in and out of competition. According to WBC guidelines, any boxer who tests positive for this compound faces sanctions ranging from temporary suspension to the loss of their rankings and championship opportunities.

Recent cases in various sports have highlighted that Clostebol can enter the body even through the use of topical creams or medications.

The ban on Clostebol and other anabolics aims to ensure fairness in boxing and, most importantly, protect the health of fighters. Their use not only distorts the competition but can also cause severe side effects such as hormonal imbalances, liver problems, and cardiovascular risks.

You can check the full list of prohibited substances issued by VADA at the following link: https://wbcboxing.com/wp-content/uploads/2025/VADA-Prohibited-List-2025.pdf