Medical Letter on the CDC & FDA

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Amino Acid Supplementation

Branched-chain amino acid supplementation does not alter performance in the heat

According to a study from the United States, "The serotonin system may contribute to reduced human performance when hypohydrated in the heat. [Our] study determined whether branched-chain amino acid (BCAA) supplementation could sustain exercise and cognitive performance in the heat (40 degrees C dry bulb, 20% relative humidity) when hypohydrated by 4% of body mass."

S.N. Cheuvront and colleagues of the U.S. Army Environmental Medicine Research Institute described their study, "Seven heat-accliniated men completed two...

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