Acetyl Dipeptide-3 Aminohexanoate was tested on a group of 20 female volunteers with oily problematic acne-prone skin, aged 18-45. A gel containing 5% Acetyl Dipeptide-3 Aminohexanoate solution was applied on one side of the face and a placebo gel on the other side, twice a day for 28 days. Skin moisturisation was measured by corneometry and presence of sebum with a sebumeter.