DDF was founded in 1991 by renowned New York City dermatologist, Dr. Howard Sobel. A practicing dermatologist and dermatologic cosmetic surgeon for more than 25 years, Dr. Sobel was the first to go beyond dermatology alone when designing cutting edge skincare. Instead, he unites multiple practices for a holistic, scientific approach to exceptional skin. At DDF, dermatology is greatly enhanced by three other important practices- biotechnology, nutrition and esthetics for formulations that encourage vibrancy, clarity and a healthy appearance.