People with<unk>  often do not show any symptoms. Some individuals with<unk>  exhibit learning disabilities, mental retardation, and other neurological problems; delays in motor skills such as standing or walking; sluggishness; muscle weakness; liver problems; unusual facial features; and their breath, sweat, or urine may have a smell resembling boiled cabbage.<unk>  can occur with other metabolic disorders, such as homocystinuria, tyrosinemia and galactosemia, which also involve the faulty breakdown of particular molecules. It can also result from liver disease or excessive dietary intake of methionine from consuming large amounts of protein or a methionine-enriched infant formula.
Hypermethioninemia
Hypervalinemia
Hyperammonemia
Hyperphenylalaninemia
Hypouricemia
Hyperaemia
Isovaleric acidemia
Hyperlysinemia