Collagen induction therapy is an aesthetic medical procedure that involves repeatedly puncturing the skin with tiny, sterile needles (microneedling the skin) in order to induce endogenous production of cutaneous collagen.
CIT is often referred to as “microneedling” or “skin needling” in media and literature, however it is important to distinguish CIT from other contexts in which microneedling devices are used on the skin, e.g. transdermal drug delivery, vaccination, etc.
Typically, the procedure involves a specialized device called a microneedling device. This is marketed under various names, such as the “Dermaroller” invented by the founder of the eponymous company Horst Liebl and patented in 2000.