NOW Supplements, Choline & Inositol 500 mg, Healthy Nerve Transmission*, Nervous System Health*, 100 Capsules Nervous System Health Supports Healthy Nerve Transmission Assists in Fatty Acid Metabolism A Dietary Supplement Vitamins Family Owned Since 1968 GMP Quality Assured Choline & Inositol are members of the B-Vitamin family. Choline is necessary for normal synaptic transmission, brain health, and fatty acid metabolism in the liver. Inositol is also essential for brain and nervous system health. Both Choline and Inositol are essential components of all cell membranes.