Double Strength! 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). Note: Manufacturers continually change product specifications. While we try our best to keep product descriptions up to date, they do not necessarily reflect the latest information available from the manufacturer. We are not responsible for incorrect or outdated product descriptions and/or images.