L Tyrosine is a non-essential amino acid, which plays an important role in the production of the neurotransmitters dopamine and norepinephrine. Animal research shows that brain levels of catecholamine neurotransmitters decline with stress, which hinders well-being. These same study shows that tyrosine supplements reverse this decline while improving performance. In essence, L Tyrosine may help you stay level when you find yourself in stressful situations at work, school, or just daily life. As with all LushProtein™ products, Certificates of Analysis (COA) are provided for all key ingredients for assured quality.