Tyrosine
Tyrosine is a Non-Essential Amino Acid.
Tyrosine transmits nerve impulses to the brain, helps overcome depression, improves memory, and increases mental alertness.
Tyrosine is also said to promote the healthy functioning of the thyroid, adrenal and pituitary glands.
Dosage levels are not confirmed but some experiments have been performed with people taking up to 5 to 7 grams per day, with no confirmed toxic levels.
People taking MAO inhibitors, who suffer from high blood pressure and have problems with skin cancer should not take supplementation of L-tyrosine, and should aim to limit their intake of food sources high in this nutrient.
Meat, dairy, eggs as well as almonds, avocados and bananas are good sources of this nutrient.