Kirkman's Vitamin C Chewable Tablets are sugar free and naturally flavored with a passion fruit flavor. They contain no artificial colors and are casein and gluten free The new, improved formula contains stevia. The vitamin C is derived from a combination of ascorbic acid and sodium ascorbate. This combination produces a buffering effect and is easier on the digestive tract than pure vitamin C. Vitamin C is the most popular vitamin supplement in the United States. The human body does not manufacture its own vitamin C, therefore dietary sources and supplementation must be relied on to prevent deficiency. The list of health conditions for which vitamin C has shown promise is very long. Its value in the good health of children is extremely important for the following reasons: 1. Vitamin C supports the immune system by assisting white blood cell function, including antibody levels and responses. 2. Vitamin C is a powerful antioxidant and that can eliminate free radicals that can damage tissues, organs and cells. 3. Vitamin C is essential in the production of collagen. Collagen is the main protein substance in the human body. It holds the body together in the form of tissue, tendons, cartilage, etc. Vitamin C's role in immune system support is one of the key elements that make it very critical for supplementation in children. It is imperative that growing, active children not be deficient in this nutrient.