Healthy Visual Function* Taurine is a conditionally essential amino acid which is not utilized for protein synthesis, but is mainly found free in most tissues, especially throughout the nervous system.* It functions in tissues by stabilizing cell membranes, aiding the transport of potassium, sodium, calcium and magnesium in and out of cells.* Taurine helps to generate and regulate nerve impulses and aids in the maintenance of fluid balance; it is also used by the body in visual pathways, as well as in the brain and nervous system, where it works together with glycine and GABA as a neurotransmitter.* This product has twice the Taurine (1,000 mg) as in our regular strength product (500 mg). Natural color variation may occur in this product.