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| Tyrosine |
| Description: Tyrosine is an amino acid which is the precursor to the neurotransmitters dopamine and norepinephrine, which are responsible for regulating mood. Inadequate tyrosine can lead to norepinephrine deficiency, which can lead to depression. Tyrosine also is necessary to the production of melanin and for functioning of the adrenal, thyroid, and pituitary glands. Women who take oral contraceptives often have lower levels of tyrosine; this is probably a major factor in depression associated with oral contraception.1 A twelve week tyrosine supplementation has been shown effective in treating depression.2 Natural Sources: Meats and protein-rich foods. Useful in treatment of: depression. Recommended Dosage: Not established. Contraindications: None. References: 1Rose DP, Cramp DG. Reduction of plasma tyrosine by oral contraceptives and oestrogens: a possible consequence of tyrosine aminotransferase induction. Clin Chem Acta 1970;29:49–53. |
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