Glucosamine is a naturally occurring substance, produced in the human body, that acts as a key building block.  This amino monosaccharide, or amino sugar, is part of substances in the body known as glycosaminoglycans, which are part of a number of tissues.

Glucosamine is most commonly known for its role in supporting the health and function of joints.  Glucosamine is a key building block for tendons, collagen and synovial fluids.  The body produces glucosamine to assist with normal joint mobility and normal joint lubrication.

Glucosamine is also a component of blood vessels, heart valve and some mucous secretions.