Ester-C helps to maintain general body resistance to mild infections and respiratory ailments, and is involved in tissue repair and wound healing. Nutra-Life Ester-C®, a patented form of Vitamin C, is the most bioavailable form developed. Metabolites in Ester-C help the vitamin get into cells more efficiently. Ester-C is absorbed into the blood stream twice as fast and held in the body twice as long as ordinary Vitamin C, increasing its effectiveness. Ester-C is more effective than other vitamin C and is non-acidic (pH7). It is patented and scientifically supported. Taken daily, Ester-C helps to support natural immunity over 24 hours, during times of seasonal change and situations that challenge your immune system. Dosage:Adults: one tablet up to three times daily . Ingredients:Each Tablet Contains: Ester-C® (Calcium Ascorbate) 1000mg ,Citrus Bioflavonoids Extract 100mg.