most creams are not able to penetrate through epidermis which constitutes a significant barrier for them. Therefore, their effects are mainly superficial. Active ingredients of skin care products are oxidized by exposure to light, so only a small percentage of valuable substances reach intercellular space. Thanks to Roll-Cit, this barrier is eliminated.Roll represents a roller, whereas Cit is short for Collagen Induction Therapy. Roll-Cit is a device used for skin micro-needling.