Learn more about lipids with Professor Thomas M. Terry. Fats or triglycerides are formed by three fatty acids each bonded by an ester linkage to glycerol. 1  Twist and turn the lipid below to see how kinky fatty acids are.
Superficial peels are the mildest type of chemical peel. They can be used on all skin types. In most cases, they use liquid containing a mild (dilute) acid, most often glycolic acid. Dry ice (solid carbon dioxide) is sometimes used. Medium peels soak deeper into the skin than superficial peels do.
A chemical peel can be either light, medium, or deep. A light peel is the mildest and is used to eliminate or improve fine wrinkles, remove rough or dry skin, reduce acne and uneven pigmentation, and mild damage caused by the sun. A medium chemical peel is more effective in removing blemishes and discoloration and corrects fine wrinkles.