L-Tyrosine is a precursor of the amino acid dopamine and noradrenaline.Griffonia simplicifolia contains an amino acid called the L-5-HTP (Hydroxytryptophan), a precursor of serotonin. It improves brain activity and nervous system.Chromium is a natural trace element, indispensable and essential that contributes to the maintenance of normal blood sugar and normal metabolism of macronutrients.