A methamphetamine analog (N,α-diethyl-phenylethylamine) identified in a mainstream dietary supplement

Pharmaceuticals and banned substances have been detected in hundreds of purportedly natural supplements. Recently, several athletes have been disqualified from competition after testing positive for the methamphetamine analog N,alpha-diethyl-phenylethylamine (N,alpha-DEPEA). Athletes have claimed they unknowingly consumed the banned stimulant in workout supplements. Three samples from different lot numbers of Craze, a workout supplement, were analyzed to detect the presence and concentration of N,alpha-DEPEA. Two labs independently identified N,alpha-DEPEA in the supplement using ultra high performance liquid chromatography (UHPLC) coupled to an LTQ Orbitrap XL mass spectrometer and UHPLC-quadruple-time-of-flight mass (Q-TOF) spectrometer, respectively. The identity of N,alpha-DEPEA was confirmed using nuclear magnetic resonance and reference standards. Manufacturer recommended servings were estimated to provide 21 to 35 mg of N,alpha-DEPEA. N,alpha-DEPEA has never been studied in humans. N,alpha-DEPEA is a methamphetamine analog; however, its stimulant, addictive and other adverse effects in humans are entirely unknown. Regulatory agencies should act expeditiously to warn consumers and remove N,alpha-DEPEA from all dietary supplements. Copyright (C) 2013 John Wiley & Sons, Ltd.