Collagen stimulation therapy cst is fast becoming the anti ageing treatment of choice for the discerning client as it uses no chemicals or toxins it can be used around the eyes as well as the face and neck resulting in a firmer healthier skin which in turn produces a more youthful appearance by creating micro channels active vitamins can penetrate the layers of the skin incresing the effectiveness of environ skin care products and stimulating natural collagen production an initial cons