Before revision: In humans, the glucogenic amino acids are: Alanine Arginine Asparagine Aspartic acid Cysteine Glutamic acid Glutamine Glycine Histidine Methionine Proline Serine Threonine Valine Amino acids that are both glucogenic and ketogenic (mnemonic "PITTT"): Phenylalanine Isoleucine Threonine Tryptophan Tyrosine Only leucine and lysine are not glucogenic (they are only ketogenic)
After revision: In humans, the glucogenic amino acids are: Alanine Arginine Asparagine Aspartic acid Cysteine Glutamic acid Glutamine Glycine Histidine Methionine Proline Serine Valine Amino acids that are both glucogenic and ketogenic (mnemonic "PITTT"): Phenylalanine Isoleucine Threonine Tryptophan Tyrosine Only leucine and lysine are not glucogenic (they are only ketogenic)