Collagen is a natural protein component of the skin that acts like a scaffold and the main building block for cells, tissues and organs. About a third of the protein content in your body is made up of collagen, which is found in the bones, muscles, and tissues of the organs.
No: The joint should not have any appreciable fluid in it normally. Fluid can be there from many reasons. Arthritis can cause fluid. Also surgery can cause some bleeding in the knee which can cause the fluid to build up. The fluid makes the joint stiff and makes it hard to get a good quad function. ...Read more.
1 This fluid may fluctuate in amount and the symptoms may come and go. This is the most common type of swelling and often seen as a result of knee arthritis or wear-and-tear.  Knee Arthritis. Knee arthritis causes the body to produce extra fluid in the knee joint.