Dr. Glat will begin by numbing the scalp with a topical anesthetic. A blood sample will be drawn and processed in a centrifugal machine that separates solids and liquids. A serum is then created with an extremely high concentration of platelets, the specialized cells responsible for healing. The PRP is then placed in a syringe and carefully injected just beneath the scalp’s surface. The entire procedure can take 60 to 90 minutes.