Hypermethioninemia (MET)


Hypermethioninemia (MET) is a condition that occurs when there is a high amount of methionine in the body. MET is considered an amino acid condition because people with MET are unable to break down an amino acid, a building block of proteins, known as methionine. Many people with MET do not show signs of the condition. However, if MET is untreated, it can cause learning delays, muscle weakness, and other health problems in some individuals.

This condition is also known as: deficiency of methionine adenosyltransferase, glycine N-methyltransferase deficiency, GNMT deficiency, hepatic methionine adenosyltransferase deficiency, MAT deficiency, MET, methionine adenosyltransferase deficiency, Methioninemia, s-adenosylhomocysteine hydrolase deficiency.

For more information about Hypermethioninemia, visit Baby's First Test: Hypermethioninemia. Please see Medically Prescribed Formula for information about medically prescribed formula and pharmacologic interventions for inborn errors of metabolism. Visit Board Certified Metabolic Providers (PDF: 2 pages/204KB) for a listing of medical specialists and clinic contact information.