Support your immune health all year long with Ester-C Vitamin C, a superior form of Vitamin C.(1) Ester-C 24 Hour Vitamin C Supplement Tablets for Immune Support offer a unique formula that stays in your system for up to 24 hours, so you have around-the-clock immune support.(1) The metabolites in Ester-C help enhance the retention of Vitamin C in your white blood cells, which are a vital component of your immune system.(1) These vitamin supplements are non-GMO, and Ester-C Vitamin C tablets are manufactured without chemicals to neutralize pH, which makes them non-acidic and gentle on your stomach. Incorporate this antioxidant vitamin supplement into your daily routine to give your immune system the support it needs.(1) Ester-C is the kind of support you can count on 24/7! (1)These statements have not been evaluated by the Food and Drug Administration. These products are not intended to diagnose, treat, cure, or prevent any disease. (2)The Vitamin C in Ester-C has been clinically studied to stay in the white blood cells for up to 24 hours, which is longer than regular Vitamin C. White blood cells are an important component of the immune system.