Here's some of the vast amount of research backing it up....
2. Showing that the Vampire Facial® (miro-needling combined with PRP in a very specific way) works to help with wrinkles and to tighten the skin (click)<--
3. Here researchers compare micro-needling with PRP vs micro-needling with saline (click)<--
Much more research can be found, but these represent the sorts of results being seeen.