Chemically, glucosamine belongs to the group of amino sugars. Its structure is related to that of glucose, but it also contains an amino group.

Glucosamine occurs naturally in the human body, where it forms part of certain structural components of cartilage and other connective tissues.

Glucosamine is not typically present in significant amounts in everyday foods. It is a naturally occurring substance in the body and can also be obtained from certain natural raw materials for use in food supplements.

The name glucosamine refers to a specific chemical compound, not a plant extract or vitamin.