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Abstract
Some individuals with acne-prone skin appear to react negatively to certain external factors. Past observations have pointed to a variety of such factors including friction, utraviolet light, and certain cosmetics and medications. Having tests in place to screen potential new products on this skin type is of importance to the dermatologic, cosmetic, and pharmaceutical communities.
Based on current knowledge in this area, we have set out to design tests intended to help detect potential problems. This paper will detail human assays recently used to assess comedogenicity, pustulogenicity, and other phenomena that could possibly create or worsen acne. These tests combine clinical and noninvasive laboratory evaluations. Methods and data from assays conducted on both the back and face will be presented.