Supports a positive mental state and healthy stress management.*. What is L-tyrosine? Tyrosine is a non-essential amino acid that can be created from the essential amino acid phenylalanine. Besides being necessary for normal growth and development tyrosine serves as a precursor to the neurotransmitters dopamine norepinephrine and epinephrine. It’s essential for thyroid hormones and is an important part of peptides such as enkephalins. . How does L-tyrosine support health? Supports a positive mental state and healthy stress management.*. Supports working memory during times of stress.*. Important nutrient for healthy adrenal function.*. Maintains healthy brain neurotransmitter function and cognitive performance.*. Supports mechanisms involved in coping with stress.*. Why choose Vitacost L-Tyrosine? Supplies 500 mg of L-tyrosine per single-capsule serving. Contains 100 servings per bottle. Exceptional quality at extraordinary value! About Vitacost. Vitacost nutritional products are manufactured to high standards of quality efficacy and safety. Each Vitacost product meets or exceeds the standards and requirements set forth in the FDA’s Code of Federal Regulation (21 CFR 111) Current Good Manufacturing Practices (CGMP). . . * These statements have not been evaluated by the Food and Drug Administration. This product is not intended to diagnose treat cure or prevent any disease.