Hello and thank you for your question. There are many ways to improve scars. There are also many devices that claim to improve scars with little data. Micro needling itself will improve scars. The combination with PRP may help improve scars but I do not believe there is sufficient information to support all of the claims of PRP. In the future we may have more information available. Best WishesTheodore T. Nyame MD Harvard Trained Plastic Surgeon