Chemical peels are divided according to the depth of penetration into three groups:
1. Light peels (superficial): Glycolic, salicylic etc...
2. Medium depth:TCA
3. Deep peels: Phenol.
The clinical effect and also side effects varies according to the depth. Superficial and medium depth side effects are mainly related to local skin issues e.g hypopigmentation, hyperpigmentation, scars etc.
Deep peels especialy phenol have side effects related to their toxicity e.g cardiac arrythmias and liver problems.
TCA is the most useful in my mind. The concentration can vary 15-45%. The peel is very technique dependent and must be used with care.
Hope that helps!



