Tyrosine plays a role in the function of the Adrenal, Pituitary and Thyroid glands. It is an essential Amino Acid able to cross the Blood-Brain barrier. Once in the brain, it is a precursor for the Neurotransmitters Dopamine, Norepinephrine and Epinephrine better known as Adrenalin. These Neurotransmitters are an important part of the body's sympathetic nervous system. Tyrosine is not found in large quantities throug hout the body because it is rapidly metabolised. Amino Acids are essential to health. Most form the small structural components of protein and are required for the synthesis of protein within the body. The primary function of most Amino Acids is to furnish the essential material for duplication of the genetic code, for cell division, and for the formation of muscles and connective tissue.
