Now Taurine – Nervous System Health! Natural Nutritional Support For Cell Membrane And Calm Mood!Natural Nutritional Support For Cell Membrane And Calm Mood! NOW Taurine is a free-form amino acid that participates in a variety of metabolic processes. Taurine is a neurotransmitter, a neuromodulator and is involved in glucose uptake. It’s a component of bile acids, which are used to help absorb fats and fat-soluble vitamins. Taurine also helps regulate the heart beat, maintain cell membrane stability, and prevent brain cell over-activity. Taurine is found in meats, fish, milk and eggs, but not in vegetable proteins.