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Vitamins, derived from the Latin word for life, are essential organic substances required in small quantities for optimal growth and overall well-being. Unlike other organic nutrients, vitamins don't act as sources of energy or building materials but rather facilitate these nutrients' utilization by the body. Vitamins are predominantly coenzymes, assisting enzymes in specific chemical actions, like the oxidation of glucose for energy involving B vitamins. Most vitamins are not produced in our...

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Nutrition Supplements: Science vs Hype.

T D Armsey¹, G A Green

¹Department of Family Medicine, University of California, Los Angeles, CA, 90095, USA.

The Physician and Sportsmedicine

|January 21, 2010

Summary

Many athletes use supplements for performance, but scientific evidence is often lacking. Some supplements like creatine may offer benefits, while others lack proof and may be harmful.

Area of Science:

Sports Science
Nutritional Biochemistry

Background:

Athletes frequently use nutrition supplements for performance enhancement.
Marketing often overstates the benefits of these supplements.
Scientific evidence for ergogenic claims is frequently limited or absent.

Purpose of the Study:

To evaluate the scientific evidence for the efficacy and safety of popular sports nutrition supplements.
To inform athletes and healthcare professionals about the actual benefits and risks.

Main Methods:

Systematic review of scientific literature on ergogenic aids.
Analysis of studies investigating specific supplements like amino acids, creatine, and DHEA.
Assessment of reported side effects and safety concerns.

Related Experiment Videos

Main Results:

No proven benefits for amino acids, L-carnitine, L-tryptophan, or chromium picolinate.
Creatine, beta-hydroxy-beta-methylbutyrate, and dehydroepiandrosterone (DHEA) show potential ergogenic or anabolic effects.
Chromium picolinate and DHEA have documented adverse effects; safety of others is uncertain.

Conclusions:

The efficacy of many popular sports supplements is not scientifically supported.
Athletes should exercise caution due to potential risks and lack of proven benefits.
Further research is needed to clarify the safety and efficacy of certain supplements.