What is the correct depth to put the dial on the microneedling pen when doing microneedling treatments? Well, isn’t that a good question?Microneedling Therapy also called Collagen Induction Therapy (CIT), and percutaneous (through the skin) Collagen Induction (PCI), is a minimally invasive skin-rejuvenation procedure that involves the use of a microneedling device, I personally use...