Cognitive AminosProvides amino acid precursors for healthy neurotransmitter activity, supporting mental function and healthy mood*. Age related decreases in levels of several amino acids may influence cognitive function. Amino acids are important intermediates in the production of neurotransmitters in the brain and are involved in neuromodulating activities. l Tyrosine is an amino acid naturally synthesized in the body. It is the precursor of the neurotransmitters l