NOW Foods Taurine 1000 mg (Double Strength) provides a generous dose of this conditionally essential amino acid that is one of the most abundant free amino acids in the body — particularly concentrated in the heart, brain, eyes, and muscles. Taurine plays critical roles in cardiovascular function (regulating heart rhythm and blood pressure), neurological health (acting as an inhibitory neurotransmitter and neuroprotective agent), eye health (protecting photoreceptors from oxidative damage), and athletic performance (reducing exercise-induced oxidative stress). Unlike most amino acids, taurine is not incorporated into proteins but functions directly in signaling and protective roles. NOW Foods delivers 1,000 mg of pharmaceutical-grade taurine per capsule — double the standard dose — in a clean, additive-free vegetarian formulation manufactured and tested in their GMP-certified facility.