Ascorbyl glucoside is a kind of vitamin C which contains the stable component of glucose. When cream and lotion containing this remarkable substance are applied in skin, Ascorbyl glucoside is hydrolyzed by glucosidase, an enzyme presenting in the membrane of skin cells. This process releases vitamin C in its natural active form. When vitamin C enters cells, it results in significant well-documented biological responses. It has been demonstrated to be hydrolyzed over a prolonged period giving its beneficial physiological effects to the cells and tissues in a constant and sustained manner. Compared with other vitamin C derivatives, ascorbyl glucoside has a better stability and solubility in solution and could essentially inhibit the discolour and degradation of vitamin C in cosmetics while keeping the whole bioactivity.