PMID: 11897888Mar 19, 2002Paper

Sport nutritional supplements: quality and doping controls

Canadian Journal of Applied Physiology = Revue Canadienne De Physiologie Appliquée
Christiane AyotteA Fakirian

Abstract

Nutritional supplements are part of the diet of many athletes. With the exception of caffeine and ephedrine alkaloids, most of these products do not contain substances that are prohibited to competing sportsmen. In recent years, androgens, pro-hormones such as DHEA, androstenedione, androstenediol and 19-norsteroids became available for oral self-administration in many countries and on the Internet. Their claimed actions, efficiency or potency, and the possible adverse effects have not been thoroughly investigated by controlled clinical studies. Some products were shown to contain prohibited substances such as ephedrine, caffeine, or steroids, that were not listed on the label. Urine samples collected after the administration of these supplements can test positive. The administration of natural steroids such as testosterone and its precursors cannot be proven by the sole identification of the substances in the urine. The approach to detection is based upon the deviation of selected parameters of the metabolic profiles from the range of values normally found in humans. The individual's norm is also studied to exclude the few cases of systematic and natural excretion of extreme values. The combination of the GC/MS and the GC/C/IR...Continue Reading

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Citations

Jun 27, 2006·British Journal of Sports Medicine·C Ayotte
Oct 25, 2007·British Journal of Sports Medicine·Olivier de Hon, Bart Coumans
Nov 26, 2008·Steroids·Claudiane GuayChristiane Ayotte
Jun 24, 2008·Journal of Mass Spectrometry : JMS·Peter Hemmersbach
Oct 1, 2005·Journal of Sports Sciences·R J Maughan
Jun 21, 2012·American Journal of Men's Health·Mohammed Baqer HabeebQais Nea'amah Khashoom
Jan 22, 2008·Clinics in Sports Medicine·Luigi Di Luigi
Mar 23, 2018·International Journal of Sport Nutrition and Exercise Metabolism·Ronald J MaughanAlan Vernec
Sep 14, 2007·Mass Spectrometry Reviews·Jean-Philippe GodinGérard Hopfgartner
Nov 13, 2007·Clinical Journal of Sport Medicine : Official Journal of the Canadian Academy of Sport Medicine·Kelly Anne ErdmanRaylene A Reimer
May 4, 2005·Clinical Journal of Sport Medicine : Official Journal of the Canadian Academy of Sport Medicine·Norbert BaumeMartial Saugy
Jan 25, 2006·Scandinavian Journal of Medicine & Science in Sports·N BaumeM Saugy
Nov 19, 2010·Bioanalysis·Henrique Marcelo Gualberto PereiraFrancisco Radler de Aquino Neto
Aug 9, 2017·International Journal of Sport Nutrition and Exercise Metabolism·Elliot R CooperAlison K Heather
May 28, 2019·Rapid Communications in Mass Spectrometry : RCM·Michele IannoneXavier de la Torre
Jul 20, 2002·Clinical Journal of Sport Medicine : Official Journal of the Canadian Academy of Sport Medicine·Andrew Pipe, Christiane Ayotte
Oct 18, 2016·Current Opinion in Clinical Nutrition and Metabolic Care·Louise Deldicque, Marc Francaux
Apr 18, 2021·Drug Testing and Analysis·Rachel A LundAlison K Heather
Jul 3, 2021·Journal of Sports Science & Medicine·Erik DuivenOlivier M de Hon

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