Hyaluronic acid is found in normal joints as a central component to healthy joint fluid. As joints age, the amount of hyaluronic acid in the joint decreases. A result of this is a loss of resilience in the joint; a loss of shock absorbing capacity in, and lubrication of the joint. Hyaluronic acid injections are sometimes compared to filling a car with oil. This analogy loses some of the nuances of how hyaluronic acid injections may help joints, but it is a helpful picture of how they...
