What is Collagen P.I.N.? Collagen P.I.N. is Percutaneous Collagen Induction Therapy. It is a method of inducting a controlled injury into the skin's dermal & epidermal junctionwhich induces growth factors, new collagen and elastin. This process causes much less damage to the epidermis than dermal rolling, or other ablative treatments. Thus, protecting the skin's cell growth making for a quicker healing and higher rates of sucess (Induction Therapy, 2020).