Cabot Health Tyrosine Pure 75g. Tyrosine is a natural amino acid and one of the building blocks of protein. Benefits of tyrosine can include; Improved mood-Tyrosine is required for the production of neurotransmitters-dopamine, adrenalin and noradrenalin. Deficiencies of these brain chemicals are associated with increased incidence of depression and other mood disorders. Tyrosine may act as a mood elevator, helping to stabilise mood and improve feelings of happiness and satisfaction. Stress reduction-In times of stress, additional tyrosine may be required as stress depletes noradrenaline in the body. Thyroid function-Tyrosine plays a critical role in the production of thyroid hormones T3 and T4. The thyroid gland is responsible for regulating metabolism, growth and development, body temperature and heart rate.