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NOW: L-Tyrosine 500 mg Capsules. PRODUCT DESCRIPTION Helps in the management of some forms of stress (physical, psychological, sleep deprivation, multitasking, etc.). Pharmaceutical Grade 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. NPN 80004769 Adult Dosage: Take 2 capsules 1-2 times daily between meals. Take up to one hour before, or during periods of physical stress. For occasional use. Each capsule contains: L-Tyrosine 500 mg Non-Medicinal Ingredients: Capsule (gelatin, water), Stearic Acid (vegetable source), Silica.