The answer is that the active agent injected under the skin is "oily carbolic acid." The endopeel website claims this product is different than phenol. However carbolic acid and phenol are one and the same. Carbolic acid is a very potent agent that is the basis for performing the strongest of chemical peels. Injecting this agent under the skin will cause profound scaring. Can this be controlled to cause cosmetic benefit? The promoters of this method have published no peer reviewed studies of this method. Their own site shows horrific facial scaring after this procedure. In the strongest possible terms, I advise you not to have this procedure and to discouraged loved ones from having this "procedure." The foreseeable damage from this type of medical experimentation can not possibly worth any potential benefits. In my opinion, no ethical physician or surgeon should be performing this procedure. Please consider yourself warned about the potential consequences of this procedure.