Vitamin c ascorbic acid is an essential water soluble vitamin that has a wide range of functions in the human body with its primary function being a excellent antioxidant our 100 pure vitamin c powder is from ascorbic acid one of vitamin cs most important functions is acting as an antioxidant protecting ldl cholesterol from oxidative damage when ldl is damaged the cholesterol appears to lead to heart disease but vitamin c acts as an important antioxidant protector of ldl the antioxid