Receive the benefits of vitamins, minerals, and other nutrients - support your metabolic processes and energy levels with B Vitamins, and support your immune system with Vitamin C, Zinc, and Vitamin E. Immune Support: Vitamin C's properties are vital for your body, limiting the damage done by free radicals while supporting immune function and overall well-being. Vitamin D3, the same type of Vitamin D that your body naturally produces when exposed to sunlight, supports immune functions and bone health, while Vitamin E also strengthens your immune system.