TYROSINE is an amino acid that is categorized as ënon essentialí and supplemental tyrosine is used to reduce chronic fatigue, stress and also combat narcolepsy. It acts as a precursor of norepinephrine as well as dopamine neurotransmitters. It can act on mood elevation and also depression. It helps in the production of melatonin which plays an important role in thyroxin production. Tyrosine deficiency can cause low blood pressure and body temperature, hypothyroidism.