L-TYROSINE L-Tyrosine is a precursor to various stimulating neurotransmitters in the body. The effects can be characterized by increased energy levels, increased libido and reduced appetite. Each capsule contains L-tyrosine 500mg and Vitamin B6 (Pyridoxine HCl)10 mg (500US RDI*) Other ingredients: oryzae amylum, magnesium stearate, silica, gelatin. Usage: Take 1 capsule a day on an empty stomach with water, at least half an hour before your meal. Warning: Do not use with MAO inhibitors.