Popular Supplements for Athletes

Photo: Supplements

Supplements that claim to make you better, faster, and stronger can be very appealing, but be wary when considering athletic supple-ments. Most are not effective. A few have some evidence that they work, but it is only very slight improvements. See the table below for information on some popular supplements.

Supplement Claim to fame Fact or fiction?
Antioxidants
(C, E, CoQ10)
Reduce inflammation and soreness Studies show they can actually hin-der performance. May be because oxidation is an important part of ex-ercise training. (Caution: high doses of vit E can be harmful.)
Beta-Alanine Improve performance, build muscle mass Studies show conflicting results. Some studies show a slight improvement in brief, high-intensity effort.
Branched-Chain Amino Acids (BCAA) Reduce fatigue, in-crease muscle growth, enhance performance. Not enough evidence, study results are conflicting.
Caffeine Decrease soreness, enhance performance. Study results are conflicting, but some studies show it can reduce subjective feelings of exertion and fatigue. (Caution: high doses and long-term intake can lead to severe side effects.)
L-carnitine Increase fat burn Not enough evidence. Studies are small and of short duration, with conflicting results.
Citrulline Increase oxygen and nutrient delivery to muscle. Not enough evidence. One study showed worse performance.
Creatine Increase strength and performance. Some studies show it may increase strength and endurance with exercise.
Chromium Picolinate Increase weight loss, improve body composition. Studies show it does not improve weight loss, body composition, or strength.
Medium-Chain Triglycerides (MCT) Improve performance, decrease body fat. Not proven to improve endurance or to decrease body fat.
Pyruvate Improve endurance, decrease body fat for weight loss. Majority of evidence shows that it does not improve athletic perfor-mance. Not enough evidence for weight loss.