If you decide to opt for a TCA peel course, our practitioners typically recommend 4 treatments if your skin is fair or olive. A deep, one-off TCA peel can be performed on types 1-3. In darker skin types, TCA peels have to be performed slightly differently, meaning that a longer time is left in between treatments. We tend to start off with a lower percentage TCA on darker skin types (Fitzpatrick type 4+) and increase the number of peel 'layers'.