**California Institue of Technology** Chemical peels are methods to cause a chemical ablation of defined skin layers to induce an even and tight skin as a result of the regeneration and repair mechanisms after the inflammation of the epidermis and dermis. Chemical peels are classified into three categories.65,66 Superficial peels [α-β-, lipo-hydroxy acids (HA), trichloroacetic acid (TCA) 10–30%] exfoliate epidermal layers without going beyond the basal layer; medium-depth peels (TCA above 30 to 50%) reach the upper reticular dermis; deep peels (TCA > 50%, phenol) penetrate the lower reticular dermis. The depth of peeling depends not on the substance used only, but on its concentration, pH of the solution and time of application. This study measured the effects of Alpha Hydroxy Acid, Glycolic Acid, Polyhydroxy Acid on perceived skin smoothness. The subjective skin smoothness score obtained by combining the scores of 20 participants. Multiple suspensions of Glycolic Acid, Polyhydroxy Acid and Alpha Hydroxy Acids were tested by varying the percent concentration levels. Suspension consisted of all three acids at varying levels in water and glycerin.