Cell Theory Biological Age Control System is a topical therapy developed by New York Plastic surgeon Dr W Mark Warfel. to deliver the most technologically advanced treatment to the skin. Each Cell Theory topical product treats the skin in a unique way by targeting specific cellular interactions. The skin is changed on a molecular level. The products act synergistically to change the nature of the skin, reversing sun damage while making the skin thicker, firmer, stronger and more elastic. Dr Warfel recommends using all the products in the system to be sure you get the benefits of each. All the products are concentrated so only a small amount is needed for each application.