TCA is used as a chemical peel but in the context of PRX T33 has been modified to pass through the skin layers and act as a stimulant to the layers below. At each treatment the gel is massaged into clean and degreased skin. There will be some immediate redness and swelling but over four to six treatments the skin responds by creating more support tissue and appearing considerably fresher. PRX T33 is a collagen stimulator for those who are not ready for needle-based treatments, or who wish to augment the results of any other treatments.