Platelet rich plasma has been utilized in hair restorations surgery since 2004 and its role is expanding as more physicians understand the benefits in this surgical procedure. While still experimental, the use of PRP in patients as an adjunct treatment to thicken hair is gaining popularity and has been used since 2007. Double randomized independent studies are ongoing to further evaluate the efficacy of its use for this purpose, but because it is autologous (same donor) it is a safe therapy.