Joint Decision is a molecule manufactured by cells in our body from the food that we eat. It is a component that our bodies cannot survive without. All cartilage, regardless of where it it is located in the body must have an adequate supply of glucosamine. Cartilage gets glucosamine from the synovial fluid that surrounds all of our joints. By taking Joint Decision, you increase the glucosamine level in the fluid around the joint which allows the cartilage to do what is designed to do: properly cushion the joint movements.