Cardiologists Question the Utility of the Drugs Found in Valieva's Blood The New York Times The World Anti Doping Agency filed a brief in the Valieva case stating that the mention on the form of L carnitine and Hypoxen, though both legal, undercuts the argument that a banned substance, A Review of Hypoxen Pharmacology and Potential to Enhance Sports Performance Jdrejko 2025 Drug Testing and Analysis Wiley Online Library The World Anti Doping Agency filed a brief stating that the existence of L carnitine and Hypoxen in the 15 year old skater's system isn't illegal, but undercuts the argument that a banned heart medication may Selection of the studies included in the systematic review. Download Scientific Diagram Comprehensive review of the expanding roles of the carnitine pool in metabolic physiology: beyond fatty acid oxidation Journal of Translational Medicine Springer Nature Link