New high potency vegan glucosamine. Glucosamine, which is naturally synthesised within the body but rarely found in natural food sources, provides raw material for the building blocks of cartilage tissue around joints. Derived from non-GMO corn, our high strength Vegan Glucosamine provides a suitable alternative to the glucosamine commonly derived from shellfish and allows those following a vegan or vegetarian diet to enjoy the benefits of glucosamine supplements.