Ester-C is a researched form of Vitamin C that supports immune system health. Ester-C may lead to more sustained retention of Vitamin C in the white blood cells than ascorbic acid in non-smokers. It is a non-acidic form of Vitamin C and may be better tolerated than standard Vitamin C in people who are sensitive to acidic foods. Vitamin C is essential for the proper function of the immune system and decreases the duration and severity of common cold symptoms when taken regularly. Nutra-Life Ester-C+ Bioflavonoids: Provides 24-hour immune support Decreases the duration and severity of common cold symptoms Is an Antioxidant. Dose: Adults and children over 12 years: Take 1 tablet 2 times daily, or as directed by your healthcare professional. Ingredients: Each tablet provides: Ester-C >1000mg [Calcium ascorbate dihydrate 977mg Equiv. Ascorbic Acid (Vitamin C) 806.78mg, Calcium L-threonate 12mg, Calcium carbonate 11mg], Citrus bioflavonoids extract 100mg Equiv. Hesperidin 35mg Formulated without Gluten, wheat, animal products, dairy products, egg, soy, corn, artificial colours, artificial flavours, artificial sweeteners or preservatives. Warnings: Always read the label. Follow the directions for use. Talk to your health professional if symptoms persist, worsen, or change unexpectedly. Vitamin and mineral supplements should not replace a balanced diet.