Deep chemical peels are used for the treatment of skin that has been very aged and contains deep wrinkles. They also treat spotting and pigmentation inconsistencies very well. Deep chemical peels are made with Phenol chemicals; however phenol is not actually the chemical that makes this the deepest and most extreme peel. An active component called croton oil is carried within the solution and is very powerful. These peels can be extremely effective, but also are the most costly, have the highest risks and longest recovery periods. However, deep peels also create long last results, in some cases up to 20 years.