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.
In a chemical peel, a chemical solution is applied to the skin and allowed to soak in. Over the next 1 to 14 days, depending on how deeply the chemical penetrated the skin, the skin peels off.This procedure destroys parts of the skin in a controlled way so that new skin can grow in its place.ow a medium peel is done. The technique used to do a medium peel is similar to that used for a superficial peel, but the chemical may be left on for a longer period of time. Medium peels are more painful than superficial peels, because the chemicals are stronger and they soak deeper into the skin.