Obagi Exfoderm Forte is the product used in the Obagi Nu-Derm system for exfoliation and to help enhance the hydroquinone and tretinoin activity. This exfoliating lotion contains alpha hydroxy acids (lactic acid and glycolic acid) in a unique base to smooth and tone rough or damaged skin. Obagi Exfoderm Forte is indicated for thick, oily, large pores, and/or rough skin.