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.
Get a chemical peel. A chemical peel is a procedure that uses glycolic acid or another similar chemical abrasive to peel the melasma-affected top layer of skin away. The liquid chemical is applied to the skin, creating a mild chemical burn. As the burned layers peel off, they leave behind fresh, melasma-free skin.