As the roller moves over your skin, it creates pin point punctures into the dermis – the majority of which are simply pushing your pores open temporarily. This is perceived by the body as damage, which stimulates the release of growth factors that trigger the production of collagen and elastin. The human body naturally reacts to any injury by initiating the healing process and by persistently triggering the healing process, you encourage your body to continue healing until you are satisfied with the results. By opening the skin in this way you not only dramatically increase the penetration of any topical product, increasing its efficacy, but you also create miniature perforations that stimulate the skin’s healing mechanisms, increasing production of many important factors for a healthy skin. As with anything, please exercise caution when using this product. More or deeper is not always better.