supplements

L-Tyrosine or tyrosine (symbol Tyr or Y) or 4-hydroxyphenylalanine is one of the 20 standard amino acids that are used by cells to synthesize proteins...In dopaminergic cells in the brain, tyrosine is converted to L-DOPA by the enzyme tyrosine hydroxylase (TH). TH is the rate-limiting enzyme involved in the synthesis of the neurotransmitter dopamine. Dopamine can then be converted into other catecholamines, such as norepinephrine (noradrenaline) and epinephrine (adrenaline). The thyroid hormones triiodothyronine (T₃) and thyroxine (T₄) in the colloid of the thyroid are also derived from tyrosine.

“Tyrosine.” Wikipedia, Wikimedia Foundation, 31 July 2022, en.wikipedia.org/wiki/Tyrosine

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