SkinCeuticals Retexturing Activator Replenishing Serum - Overall best serum. 2. Mario Badescu Glycolic Foaming Cleanser. 3. L'Oréal Paris Revitalift Derm Intensives 10% Pure Glycolic Acid Serum. 4. The INKEY List Glycolic Acid Exfoliating Toner - Best in budget serum