Your skin is made up of protein, water and other minor chemicals. Proteins are very complex chains of amino acids and they are very sensitive to the level of pH surrounding them. When the skin's proteins react with an acid in a low pH coagulation occurs. This is a non-reversible reaction where the proteins are basically destroyed (frosting is what you see when this process is happening). This is the actual goal of chemical peeling the skin. The acid destroys the existing tissues so that they can be replaced with new structures. Go to www.SkinRxClinic.com to learn more and check out all the different Acids offered.