Advanced Nutrition Vitamin C and Bioflavonoids Advanced Vitamin C Formula General Health Dietary Supplement Feeling Better, Everyday Free of Gluten Kosher Parve Dairy Free Soy Free GMP Certified Facility Advanced Vitamin C Formula Vitamin C is necessary for the growth and repair of tissue throughout the body. It is also an essential antioxidant and helps support the immune system. Since vitamin C is water soluble, the body cannot store it; therefore a continuous supply is needed.