Homocystinuria and hypermethioninemias are inherited disorders in which the body is unable to process an amino acid called methionine (found in protein containing foods). Homocystine, methionine and/or other harmful substances build up in the body. Babies appear normal at birth. If untreated, HCy can cause delays in development, eye problems, blood clots and bone problems. H-Met represents a group of disorders that can lead to delays in development or liver problems is untreated, although some mild forms not requiring treatment can be detected by the screening test. For those requiring treatment, a special diet, medical formula and supplements starting at an early age can reduce the chance of developmental delays. One baby in 45, 000 is born with HCy or H-Met.
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