Olive Oil is a natural oil made from an olive that has in itself the abililty to cure many ailments from dry skin to muscle aches and pains.  Although it is a little on the pricey side it is well worth it.  I has many uses from cooking, to healing; I personnally use it for cooking because it isn't heavy oil like vegetable oil.  There are may products derived from olive oil including hair products.  I subsitute olive oil in receipes that generally use vegetable oil and not only is the taste better it is less greasy and easier on the stomach.  My 90 year old dad uses olive oil for pains in his arms, legs and hands due to arthiritis.