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Dietary SupplementN-Acetyl L-tyrosine is a more rapidly absorbed and bioavailable form of the amino acid L-tyrosine and is less prone to urinary excretion. L-Tyrosine is converted in the body to key biological compounds including epinephrine dopamine L-dopa CoQ10 thyroid hormones and melanin. The B vitamins pyridoxine (B-6) and folic acid are provided to assist in the conversion process.