Nature Made Extra Strength Vitamin C 1000 mg is a dietary supplement that supports immune health, provides antioxidant support, and aids in iron absorption. Sourced from high-quality ingredients, these gluten free Vitamin C 1000mg tablets are antioxidant supplements that have no color added, no artificial flavors, and no added preservatives. Vitamin C is an antioxidant that helps support your immune system and is also needed for collagen synthesis to support overall skin health. If you are not receiving enough Vitamin C from your daily diet or taking a Vitamin C supplement, then these Nature Made 1000 mg Vitamin C tablets can help. Adults take one 1000mg Vitamin C tablet daily with water and a meal. Nature Made supplements are quality you can trust. USP has tested and verified ingredients, potency, and manufacturing process. USP sets official standards for dietary supplements. Visit the USP verified website for more information. *Based on a survey of pharmacists who recommend branded vitamins and supplements.