L-Tyrosine is a conditionally indispensable amino acid required for the production of the neurotransmitters dopamine, adrenaline, and noradrenaline, as well as for the skin pigment, melanin.* Noradrenaline (norepinephrine) and adrenaline (epinephrine) are the main actors in the body’s response to acute stress and, along with dopamine, help to support a positive mood and mental alertness.* In addition, L-Tyrosine is especially critical for the normal function of the thyroid gland.* The L-Tyrosine used in this product is Pharmaceutical Grade. Natural color variation may occur in this product.   PHARMACEUTICAL GRADE/HEALTHY GLANDULAR FUNCTION*: L-Tyrosine is especially critical for the normal function of the thyroid gland.* Help to support a positive mood and mental alertness CERTIFICATIONS/CLASSIFICATIONS: Dairy Free, Egg Free, Made without Gluten, Non-GMO, Nut Free, Soy Free Dairy Free;Egg Free;Halal;Kosher;Made w/o Gluten;non-GMO;Nut Free;Soy Free Packaged in the USA by a family owned and operated company since 1968.