Timed-Release Stress Vitamin B Complex with Vitamin C 500 provides an excellent source of B Complex vitamins to help safeguard a sufficient daily intake. The B Vitamins, which are essential for the maintenance of a healthy nervous system, each play a role in energy metabolism in the body. Choline and Inositol are essential components of cell walls and play important roles in cell growth and function. The 500mg of Vitamin C is added to help support immune function. As an antioxidant, Vitamin C also helps to neutralize harmful free radicals in cells. Adults can take one time-release caplet daily.