An amino acid composition is provided that can promotefat burning, improve endurance, and reduce fatigue during, forexample, marathons, and that can lessen obesity and increasestress resistance.The amino acid composition comprises 3.0 to 10.0 massparts of aspartic acid, 2.5 to 9.0 mass parts of threonine,2.0 to 9.5 mass parts of serine, 12.0 to 40.0 mass parts ofglutamic acid, 7.0 to 20.0 mass parts of proline, 0.5 to 4.5mass parts of glycine, 1.0 to 4.5 mass parts of alanine, 3.0to 12.0 mass parts of valine, 0.1 to 0.8 mass part of cystine,1.5 to 5.0 mass parts of methionine, 2.0 to 8.0 mass parts ofisoleucine, 5.0 to 15.0 mass parts of leucine, 3.0 to 10.0mass parts of tyrosine, 3.0 to 10.0 mass parts ofphenylalanine, 4.0 to 15.0 mass parts of lysine, 0.8 to 4.0mass parts of tryptophan, 1.5 to 5.0 mass parts of histidine,and 2.0 to 6.0 mass parts of arginine, wherein the totalamount of these amino acids is 100 mass parts.
