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Always consult a healthcare provider or registered dietitian prior to supplementation to determine its safety and effectiveness, says Callie Champagne, RD

Food-Supplement Context UK government guidance explains that food supplements must comply with food law and must not contain medicinal ingredients or be presented with medicinal claims

Journal of applied physiology

"Pharmaceutical companies will say there are drugs which appear to have potential but never go on beyond an early development phase, so this means the whole process of interpreting data and how things can be categorised under the WADA list is difficult and subject to interpretation." - with Jon Ralph