Ester-C tablets give you immune system support at the cellular level for up to 24 hours to maintain a healthy immune system. Ester-C is non-acidic, so it's stomach-friendly Ester-C is gentle on your stomach so you can comfortably take it every day Ester-C tablets give your immune system the support it needs, while also providing your body with antioxidant vitamin C to help fight free radicals. One tablet a day can give your body the immune support it needs 24/7 Ester-C also contains C-Sorb, a citrus bioflavonoids complex Ester-C, along with C-Sorb and naturally occurring metabolites, works synergistically to enhance the retention of Vitamin C in your body, supporting your immune system for 24 hours Ester-C 1000mg tablets provide the immune support you can count on all day, every day. A daily dose of Ester-C tablets gets absorbed into your white blood cells and stays there, for up to 24 hours, which is longer than regular Vitamin C supplements. Ester-C is manufactured without chemicals to neutralize pH, which means it's non-acidic and gentle on your stomach. These statements have not been evaluated by the FDA These products are not intended to diagnose, treat, cure or prevent any disease During the summer months products may arrive warm but Amazon stores and ships products in accordance with manufacturers' recommendations, when provided.