Silicon is not present in large amounts, yet found in every type of tissues in the body. Silicon is used to keep bones, cartilage, tendons and artery wall healthy. It is required by the nails, hair and skin, silicon levels drop as we age. So if cartilage is not in any joint after surgery, silicon will replace it. If you want nice hair, and nails, silicon is also called silica. I take it and I have good hair and nails that look good and they are hard. If you do not have any idea where to get some, look to the internet. It has information on healthy products.