Cosmeceuticals are products that have a biological action, but are regulated as cosmetics and not as formal drugs. Retinol, for example, is considered a cosmeceutical.  Dr. Holder believes that these products play an effective role in general skin care as well as in boosting the anti-aging process, and often incorporates them, along with formal drug therapies, in her tailored regimen for each individual.  Among the cosmeceutical lines favored by Dr. Holder and featured at her office are Neocutis, Alyria, Topix, SkinMedica, LaRoche-Posay, Obagi, Neostrata, Glytone, and Avene.