About the Product Immune Support: Vitamin C capsules provide immune support. Vitamin C is one of the key nutritional vitamins that supports immunity. People rely on vitamin C to help maintain a healthy immune system year-round. Nourishes the Immune System: Vitamin C capsules play an important role in the function of white blood cells, a vital component of the immune system. Potent Antioxidant: Vitamin C capsules also support antioxidant health. Vitamin C is one of the best antioxidants for fighting free radicals. Vitamin C supports the immune system, including during and after intense exercise, and reduces fatigue and tiredness. It is also an essential vitamin for collagen formation, which helps maintain healthy skin and bones.