Support your immune health all year long with Ester-C Vitamin C a superior form of Vitamin C.* 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.* 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.* Every dose of Ester-C Vitamin C gets into your white blood cells and stays there for up to 24 hours plus is clinically shown to last up to two times longer than regular vitamin C.*† These vitamin supplements are non-GMO made with no artificial color flavor or sweetener and are free of gluten. Ester-C Vitamin C tablets are manufactured without chemicals to neutralize pH which makes them non-acidic and gentle on your stomach. Incorporate these antioxidant vitamin supplements into your daily routine to give your immune system the support it needs.* Ester-C is the kind of support you can count on 24/7!