With the onset of 2019, a new WADA Prohibited List has taken effect. The new myostatin inhibitor language is perhaps the most significant change and has great potential impact on the nutrition and sport drug-testing industries. Agents that may reduce myostatin expression are now considered banned, including specifically follistatin. Follistatin may be both prohibited and perhaps recommended in the form of a dietary supplement that is certified as safe for athletes. Other popular supplement ingredients that contain epicatechins, like green tea extract or cocoa extract, may also be interpreted as prohibited myostatin inhibitors.
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