Tyrosine is an amino acid necessary for the formation of neurotransmitters such as dopamine, adrenaline and noradrenaline.
This ingredient is widely used to ease the waking state without administering stimulant such as caffeine and could prove very useful for fighting stress and depression. Tyrosine supplementation has been shown to increase cognitive performance in times of stress and energize people with depression.
Despite its theoretically stimulating effect, tyrosine intake is very safe and several studies have used doses well in excess of 5000mg per day. It can be an excellent addition to your pre-workout formula or simply used to increase concentration and energy.