Nutra-Life Ester-C + Bioflavanoids is a highly bioavailable and highly absorbable form of Vitamin C. Patented and scientifically supported, Ester C is extremely effective, non-acidic (pH7), and gentle on the stomach. Nutra-Life Ester-C contains metabolites, which help Vitamin C enter the blood stream twice as fast and enable it to be held in the body twice as long. Especially in times of seasonal change and in situations that challenge the immune system, Ester C helps maintain the body's resistance to mild infections and respiratory ailments, and may assist with tissue repair and wound healing. Taken daily, each dose helps support your immunity over 24 hours. The unique natural process used to make Ester C creates Threonic acid, which is biochemically identical to the form produced in the body during metabolism of Vitamin C in the liver. This means that Ester C is rapidly and readily absorbed into the body's blood stream, and enters the white blood cells where it's main beneficial activity takes places. Ester-C is absorbed faster and more effectively with help from Bioflavonoids, which are natural compounds that occur with Vitamin C in nature and improve its use in the body. Ester C is a powerful antioxidant. It protects cells from damage caused by free radicals and helps maintain healthy cells throughout the body.