This liquid provides an excellent source of Nature's Bounty B-Complex vitamins to help safeguard a sufficient daily intake. The B-Complex is essential for the maintenance of a healthy nervous system. Nature's Bounty B Vitamins play a role in energy metabolism in the body. Sublingual B-Complex offers a distinct advantage over conventional nutritional supplements – it comes in an easy-to-use liquid form which is perfect for those who have difficulty swallowing tablets and capsules. As everyone knows, a good diet contributes to optimal health. The B-Complex is made up of vitamins that work together to perform various functions in the body.