Considered most important amino acid, used in production of brain neurotransmitters. Tyrosine sources: dairy, meat, eggs, fish, oats. Reduce depression, Parkinson’s, Alzheimer’s. Relief from fatigue. Increase memory. Nourishes organs. Regulates cortisol. Enhance function of pituitary & adrenal glands. Sharpen memory.Crosses blood brain barrier. Protects nerve cells from toxins. Improves alertness following loss of sleep.