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Nutritional supplements as a source for positive doping cases?

M Kamber1, N Baume, M Saugy

  • 1Institute of Sports Sciences, Federal Office of Sports, CH-2532 Magglingen, Switazerland.

International Journal of Sport Nutrition and Exercise Metabolism
|June 13, 2001
PubMed
Summary
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Online nutritional supplements often misrepresent their contents. Seven prohormone supplements contained undeclared hormones, and two had unlisted ephedrine and caffeine, posing health risks.

Area of Science:

  • Nutritional Science
  • Pharmacology
  • Analytical Chemistry

Background:

  • The internet has become a major source for purchasing nutritional supplements.
  • Concerns exist regarding the accuracy of product labeling for supplements, particularly those with hormonal or stimulant properties.

Purpose of the Study:

  • To analyze the chemical composition of 75 nutritional supplements purchased online.
  • To identify discrepancies between labeled ingredients and actual chemical content, focusing on hormonal substances and stimulants.

Main Methods:

  • Procurement of 75 distinct nutritional supplements via online retail.
  • Analytical testing to determine the presence and quantity of active compounds.
  • Comparison of analytical findings with product label claims.

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Main Results:

  • Seven of the analyzed supplements, all classified as prohormones, contained hormone substances not declared on their labels.
  • Two additional supplements were found to contain ephedrine and caffeine, which were not clearly indicated on their respective labels.

Conclusions:

  • A significant proportion of online nutritional supplements may contain undeclared and potentially harmful substances.
  • Product labeling for certain supplements, especially prohormones and stimulant-containing products, is unreliable, necessitating regulatory oversight.