This liquid provides an excellent source of B-Complex vitamins to help. safeguard a sufficient daily intake. The B-Complex is essential for the. maintenance of healthy nervous tissue. The B Vitamins play a role in energy. metabolism in the body. Supports Energy MetabolismSublingual 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. Each vitamin works with your body to.