Sunshine Naturals Vitamin C 1000mg Ascorbic Acid 60 Tablets Vitamin C is essential as the body cannot produce it. Vitamin C is known to help encourage the production of white blood cells which help protect the body against infection. Vitamin C is a powerful antioxidant that is known to help strengthen your body s natural defenses. Vitamin C is also known to help improve the absorption of Iron from our diets. Iron is important for making red blood cells and transporting oxygen throughout the body.