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ISOLEUCINE OR THREONINE OR GLYCINE OR PHENYLALANINE OR VALINE OR LYSINE OR TYROSINE OR SERINE OR ARGININE OR GLUTAMIC ACID OR ALANINE OR LEUCINE OR METHIONINE OR TRYPTOPHAN OR PROLINE OR ASPARTIC ACID OR HISTIDINE
- ... The test is performed by administering the amino acid arginine in a vein to raise hGH levels. The ...