Glucosamine is a natural substance found in the joints, and is a building block of cartilage, tendons and ligaments. Glucosamine plays an important role in the smooth working of the connective tissue.Research suggests that liquid glucosamine is absorbed far more quickly than capsules or tablets, which in turn makes a higher percentage of the active ingredient more readily available for use by the body. This product comes packaged in a factory sealed plastic screw top bottle.