Centrum Immune Support is specially formulated to support functioning of the immune system with elderberry extract, vitamin A. C, D, E, selenium, and zinc. Vitamin C which contributes to maintain the normal function of the immune system during and after intense physical stress and is an antioxidant for the maintenance of good health. Vitamin D and Zinc for the maintenance of good health and immune support. Elderberry extract that helps support the body’s natural immune function. Nature Meets Science. 40 Years of Nutritional Science. Support Your Immunity Today. With Vitamin C, Vitamin D & Zinc & Elderberry