Norepinephrine and dopamine are key neurotransmitters for the maintenance of alertness and mental acuity and for promoting a feeling of general well-being.* These two neurotransmitters are produced in the body from the amino acid precursors L-tyrosine and L-phenylalanine.* This conversion process also requires vitamins C and B-6 as cofactors.* NOW True Focus combines these important nutrients with other ingredients like ginkgo biloba and DMAE to complement this formula.* Natural color variation may occur in this product.