Swanson Balance B-100 is a high-potency balance of Bs for your body! The B complex vitamins are a closely related group of nutrients, and they work closely together in the body. That's why it's so important to get the right combination of B vitamins--so they can perform their roles in energy metabolism, cardiovascular maintenance and brain and nerve function at peak efficiency. Balance B-100 delivers high potencies of the entire B vitamin complex to ensure optimum nutritional performance.