Articular cartilage is made up of 60/80% of water, 8% of glycosaminoglicanes, which are responsible for preserving the characteristics of the cartilage, and 2% of chondrocytes and collagen.
Chondroitin sulfate is a natural glycosaminoglycane present in the cartilage. When orally administered, it protects against arthritic processes.

The main mechanisms of action of chondroitin sulfate are:
- Protects the cells and components of the cartilage (stabilizes membranes)
- Increases the synthesis of proteoglycans and hyaluronic acid
- Blocks the action of metaloproteases (chondrocytes)
- Inhibits NO: decreases apoptosis