Glucosamine is a naturally occurring compound found in the human body, especially in the fluid that is around the joints.* The glucosamine used in our product is derived from non-gmo corn rather than shellfish or other animals. Msm (methyl sulfonyl methane) is an efficient source of sulfur. Sulfur is an important element for the formation of collagen in the body, and is utilized by many of the body's structural molecules.* Cmo (cetyl myristoleate) and boswellia herb extract are included as additional ingredients. Cmo used in our product is derived from plant sources rather than the usual beef tallow*. Deva glucosamine is perfect for vegans, vegetarians or people with shellfish allergies who would also like to use glucosamine as a dietary supplement.*