D-Glucosamine-3-O-sulphate is a naturally occurring sugar found in the human body. It is a structural component of a number of important molecules, such as glycoproteins, heparin, and glycosaminoglycans. D-Glucosamine-3-O-sulphate has been shown to inhibit the growth of mouse tumor cells by activating effector proteins that induce apoptosis and inhibit axonal growth. It also promotes oligodendrocyte differentiation, which may be due to its ability to increase heparin levels and reduce hepcidin expression.