Enhanced absorption with C-Sorb. Non-acidic. Stomach friendly! 24 Hour immune protection. Ester-C gives you powerful immune system support. Ester-C provides your body with the antioxidant protection it needs to help keep you healthy and strong during times of seasonal change and other situations that challenge your immune system - for up to 24 hours. Powerful immune support. Ester-C is a patented ingredient that provides powerful immune system support. It is quickly absorbed and gentle on your stomach. Ester-C also contains C-Sorb. Ester-C, along with C-Sorb and naturally occurring metabolites, works synergistically to enhance the absorption and retention of Vitamin C in your body. In a clinical study, white blood cell levels of Vitamin C were elevated in subjects receiving Ester-C when measured 24 hours after initial dose. Ester-C gives you powerful immune system support at the cellular level for up to 24 hours - to help keep you healthy. Ester-C is non-acidic. That means it's stomach-friendly. Ester-C is gentle on your stomach so you can feel comfortable taking it every day. These statements have not been evaluated by the Food and Drug Administration. This product is not intended to diagnose, treat, cure or prevent any disease. Suitable for vegetarians. Free of: yeast, wheat, milk or milk derivatives, lactose, sugar, preservatives, soy, artificial color, artificial flavor, sodium (less than 5mg per serving).