Originally founded in 1991 by Dr. Howard Sobel, MD, the Doctor's Dermatologic Formula (DDF) was created to help patients care for their skin at home, in between office visits. This core philosophy quickly became the brands creed and continues to be the forefront of our mission. Only dermatologists can see beyond the surface through advanced assessment and understand the root causes of your skin concerns to address them appropriatly. DDF has found the way to combine skin assesment with unique combinations of cutting edge products to enable you to treat your skin like a professional.