Tyrosin is the non-essential amino acid precursor for dopamine, norepinephrine and epinephrine. Tyrosine hydroxylase converts tyrosine into the dopamine precursor L-DOPA; BH4, Vitamin D and iron are cofactors for that enzymatic activity.
- Implicated in depression, hypothyroidism, blood pressure disorders. If phenylalanine is normal or high, iron, Vitamin C, and Niacin supplementation may help to convert phenylalanine to tyrosine.
- Low tyrosine relative to phenylalanine could also suggests that tetrahydrobiopterin (BH4) might be low.
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- Increased tyrosine may exacerbate migraine headaches and hyperthyroid conditions.
- Elevated tyrosine levels may occur due to supplementation (phenylalanine or tyrosine), heritable enzyme defects, or liver disease.
- High levels may indicate an inability to utilize tyrosine properly, perhaps because of low levels of enzyme co-factors such as iron, copper, iodine, B6, and vitamin C.
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Alanine, Alloisoleucine, Alpha-aminoadipate, Alpha-aminobutyrate, Arginine, Argininosuccinate, Asparagine, Aspartate, Beta-alanine, Beta-aminoisobutyrate, Citrulline, Cystathionine, Cystine, Gamma-aminobutyrate, Glutamate, Glutamine, Glycine, Histidine, Homocitrulline, Homocystine, Hydroxylysine, Hydroxyproline, Isoleucine, Leucine, Lysine, Methionine, Ornithine, Phenylalanine, Proline, Sarcosine, Serine, Taurine, Threonine, Tryptophan, Tyrosine, Valine