Tyrosine (L) is a non-essential amino acid as it produced in the body from phenylalanine.
Its importance is its function as a nutritional ingredient for the synthesis of the neurotransmitters epinephrine (adrenaline), norepinephrine, melanin and dopamine.
It is also required to produce a number of important hormones including thyroxin, which has an important role in regulating the metabolism, skin health, mental health, and human growth rate.
It is also helps in suppressing appetite and reducing body fat, production of skin and hair pigment and has a positive affect on thyroid, pituitary and adrenal gland.
Although Phenylalanine is also a precursor to these hormones, Tyrosine (L) is preferred as Phenylalanine is one step removed from the metabolic process, and can aggravate high blood pressure.
When the body is stressed out, aged, or tired the availability of Tyrosine (L) is depleted.