Hello ninaself,Thanks for the question.Collagen Induction Therapy, or CIT, refers to the effect that micro injury to the surface of the skin results in new collagen formation. It is most commonly spoken about in the minimally invasive arena of micro needling treatments.Anytime there is injury to the skin, repair occurs through the formation of new collagen. Micro needling uses either a roller device or an automated pen to make tiny holes in the skin. It is mechanical damage only so it is safe for all skin types.The technology has shown promise in wrinkle reduction, acne scar improvement, and pigment reduction.Several treatments spaced 3-6 weeks apart are necessary for best results.Risk of treatment is small and down times are short so it works well in out busy modern lives.Good luck,Dr. Shah