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May 22, 2018  |  Login
Branched-Chain Amino Acids
By James F. Balch, M.D. and Mark Stengler, N.D.
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Description: The three branched-chain amino acids include L-isoleucine, L-leucine, and L-valine. They are referred to as branched-chain because of their chemical structure. They are essential amino acids, meaning that the body cannot manufacture them, so they must be present in the diet. They play a key role in maintaining and building muscle tissue.


  • Athletic training and performance
  • Liver cirrhosis
  • Phenylketonuria
  • Tardive dyskinesia

Precautions: People with Lou Gehrig's disease, amylotrophic lateral sclerosis (ALS), should avoid supplementation unless instructed to do so by a health-care professional. People with liver or kidney disease should not supplement amino acids unless under the direction of a health-care professional.

Dosage: The typical daily dosage is 50 mg per 2.2 pounds of body weight.


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