Chemical peels have become very popular in UK right now. Every have heard of a glycolic peel, but what is a TCA peel? It is a good question and lots people are wondering about. Well, Trichloracetic acid (TCA) peels are considered medium-depth peels. Yes, they are some what similar to a "lunch time peel", but they reach slightly deeper into the skin than alpha hydroxy acid (glycolic acid) peels and because of that often produce much better and longer lasting results.