#1 Pharmacist Recommended Brand♦ 24 Hour Immune Support Non-Acidic Stomach Friendly! Enhanced Absorption With C-Sorb Patented Formula Vitamin Supplement ♦Based on the results of the Pharmacy Times Survey among pharmacist who recommend Vitamin C supplement, 2008. 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. Ester-C Increase of Vitamin C at the cellular level at 24 hours. That"s what makes Ester-C The Better Vitamin CEster-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 more comfortable taking it every day.