Biotherapy Ester-C is different from ordinary or buffered Vitamin C because it is processed in purified water instead of solvents which makes it a purer form of Vitamin C. This form of Vitamin C is four times more bioavailable than other forms of Vitamin C. Vitamin C is an important antioxidant and free radical scavenger. Free radicals are incomplete atoms or molecules that are the natural by-products of everyday metabolic, detoxification, and immune system processes. These unstable compounds attack nearby molecules in an attempt to become complete. Antioxidants like Vitamin C are the body's natural defense system against free radicals. Antioxidants are molecules that can safely neutralize these harmful substances; helping to promote cell health and support against cellular damage that could lead to disease. Vitamin C also plays important roles in helping to protect HDL cholesterol, or "good cholesterol" from free radical damage. Healthy amounts of HDL have been shown to produce cardiovascular benefits and promote heart health.

Linus Pauling, a leading researcher of Vitamin C and two times winner of the Nobel Price, advised adults to take 2 to10 grams per day. Compared with ordinary Vitamin C, Biotherapy Ester-C is much better taken up by the body, stays in the body longer, and is used more efficiently by cells and connective tissues. Furthermore it does not cause the digestive problems of traditional Vitamin C and it does not affect tooth enamel.