What is PRP Hair Treatment? PRP Hair Treatment or Platelet-Rich Plasma therapy involves drawing some of your blood and working with it to create a serum that will be injected into the scalp. To get the PRP or plasma, part of the blood is sent through a centrifuge, which separates the red and white blood cells from the part that is very rich in platelets, which is composed of growth factors. The PRP serum is injected directly into the scalp where it stimulates hair follicles, increasing the blood supply to the hair follicle, and stimulating the growth of new hair. …