in the present study , the sustainable rates of production of the 5 neutral lipid classes found on the skin surface ( triglycerides + free fatty acids , wax esters , cholesterol , cholesterol esters , and squalene ) were measured on the foreheads of acne patients before , during , and following treatment with 13-cis-retinoic acid , a drug which suppresses sebum production profoundly .
C0023779
lipid
C0043076
wax