Norepinephrine and dopamine are key neurotransmitters for maintaining alertness and mental acuity and for promoting a sense of general well-being. These two neurotransmitters are produced in the body from the precursor amino acids l-tyrosine and l-phenylalanine. This conversion also requires vitamins c and b-6 as cofactors. Now® True Focus combines these important nutrients with other ingredients such as ginkgo biloba and dmae to complement this formula.