Product description phenylalanine is an essential amino acid that can be converted to l-tyrosine in the liver. Tyrosine is used in the nervous system to make a class of neurotransmitters catecholamines dopamine, norepinephrine and epinephrine. Epinephrine, made from tyrosine in the adrenal medulla, functions as a neurohormone and is known as adrenaline. In addition to acting as a neurotransmitter that supports healthy mood and sleep, norepinephrine is now known to protect brain cells by promoting a healthy inflammatory response, inhibiting oxidative stress and supporting healthy neuronal growth and connectivity. Product benefits dietary supplement. Mood support supplements. Ingredients supplement facts serving size 1 vegetarian capsulesservings per container 100 amount per serving d,l-phenylalanine 500 mg other ingredients: vegetable cellulose capsule , microcrystalline cellulose, vegetable stearate. Suggestions take one 1 capsule daily on an empty stomach in the morning, or as recommended by a healthcare practitioner. Best utilized if taken with the co-factors vitamins b6 and c. Special note free of: gluten, non-gmo, vegetarian. Warnings keep out of reach of children. Do not exceed recommended dose. Do not purchase if outer seal is broken or damaged. When using nutritional supplements, please consult with your physician if you are undergoing treatment for a medical condition or if you are pregnant or lactating.