Vitamin C tablets can enhance immunity, because vitamin C can promote the synthesis of immunoglobulins and increase the number and vitality of T-lymphocytes, which have a certain role in enhancing the body’s resistance to diseases. 2. antioxidant, because vitamin C can well scavenge free radicals, which in turn can play a good role in antioxidant and anti-aging. 3. Because vitamin C can block the formation of nitrosamines in the stomach.