Our high-quality high-potency B 100 Complex includes 11 "B" factors in a time-release formula. Sundown has developed a variety of B Vitamin Complexes to suit your individual needs, made up of several vitamins that work well together to support nervous system health.* Each nutrient in the B-Complex performs a unique role in maintaining proper metabolic functioning and is essential for well-being.* This product delivers 100 mg each of B-1, B-2, Niacin, B-6, and Pantothenic Acid; 100 mcg each of B-12 and Biotin; and 400 mcg of Folic Acid. Choline and Inositol are essential components of cell membranes and play important roles in cell growth and function.