A precursor for adrenaline and thyroid hormones. Used to treat depression, anxiety, and allergies. Combined with tryptophan to treat drug abuse. Tyrosine deficiency will result in depression and mood disorders. As a dietary precursor, tryrosine is one of the major nutritional ingredients that affect neurotransmitter synthesis and brain functions.
Tyrosine is an amino acid synthesized in the body from phenylalanine.
It is an important nutritional ingredient and factor for biosynthesis of the brain neurotransmitters epinephrine, norepinephrine, and dopamine. Tyrosine is also used to produce one of the major hormones, thyroxin which plays an important role in controlling metabolic rate, skin health, mental health, and growth rate. Tyrosine is specifically used to treat depression because it is a precursor for those neurotransmitters that are responsible for transmitting nerve impulses and essential for preventing depression. It has been tested on humans for increasing their endurance to anxiety and stress under fatigue. It was proven in research studies that tyrosine supplementation results in increased performance over a control group.