Herbs of Gold Tyrosine 1000Healthy mood Healthy thyroid function Maintains alertness Herbs of Gold Tyrosine 1000 provides high strength tyrosine in a convenient tablet dosage form. Tyrosine is an essential precursor for the synthesis of neurotransmitters, thyroid hormones and melanin, the pigment found in hair and skin. Tyrosine is a non essential amino acid (synthesised from the essential amino acid phenylalanine) and is an essential precursor for a wide range biochemical