Quantum-BTM Complete B-Complex is the first High Potency B-Complex supplement in a convenient sustained release two-caplet serving-size, (for round-the-clock protection), formulated to provide a full 100% Dietary Requirement of the essential nutrient Choline. Choline plays a critical role in fetal development. What's more, both postmenopausal women and older men may require higher amounts of Choline to prevent organ dysfunction. Choline is an essential nutrient in Brain Development, and Liver Function. In addition to the essential nutrient Choline, Quantum-BTM Complete B-Complex is fully loaded with the B Vitamins your body needs: Vitamin B1, Vitamin B2, Vitamin B3, Vitamin B6, Folic Acid, Vitamin B12, Biotin, and Vitamin B5.