24-Hour Immune Support; Ester-C Delivers 24-Hour Immune Support, So One Daily Serving Of 1000 Mg Is All You Need; As A Potent Antioxidant, It Helps Fight Free Radicals, Which Can Cause Oxidative Stress That May Lead To The Premature Aging Of Cells | Gentle On The Stomach; Ester-C'S Water-Based Manufacturing Process Neutralizes Ph, Making It Non-Acidic And Gentle On The Stomach | Optimal Absorption; Added Citrus Bioflavonoids May Help Your Body Better Absorb And Utilize Vitamin C | Naturally-Occuring Metabolites; The Naturally-Occurring Metabolites In Ester-C May Help Enhance The Retention Of Vitamin C In Your White Blood Cells, An Important Part Of Your Immune System | Suitable For Vegetarians & Vegans; No Gluten, No Yeast, No Wheat, No Milk Or Milk Derivatives, No Lactose, No Soy, No Egg, No Grapefruit, No Sugar, No Artificial Flavors, No Sodium; Non-Gmo