Yohimbine is one of the only lipolytic products that is not banned by WADA and has a sound Mechanism of Action (MOA). However, its effectiveness for fat loss remains a point of Kamila Valieva acknowledged taking two permitted substances for heart The Washington Post Erriyon Knighton banned for doping WADA's outing of Salazar whistleblower should raise concerns Sports Integrity Initiative The 2026 List of Prohibited Substances and Methods is here. Approved by our Executive Committee, the List will take effect on 1 January 2026. Discover the main modifications for 2026 on our website now!