Trichloroacetic acid (TCA) peel is used to remove damaged skin cells to exfoliate the skin. TCA peels exfoliate deeper into the dermis than a salicylic acid or glycolic acid peel, they have more potent and longer lasting results. With regular treatment, your skin appears firmer, brighter and more even in texture and tone. Hyperpigmentation, melasma, fine lines and shallow scars are lightened.