A non-essential amino acid necessary for brain function. It is a precursor of adrenaline and the neurotransmitters norepinephrine and dopamine, which stimulates metabolism and the nervous system, and regulates mood. It is also a mild antioxidant. It suppresses the appetite and reduces body fat, helps produce melanin, aids in the function of the adrenal, thyroid and pituitary glands. Helpful to reduce stress, combating chronic fatigue, reduce anxiety and depression, headaches, allergies, and effects of drug withdrawal. It can also help to increase sex drive.