Platelet-rich plasma (PRP) is made from the patient's own blood. A blood sample is drawn in the same way that it is for a standard blood test. The platelets, which are high in growth factors, are separated from the blood using a centrifuge (substances required for stimulation of growth in living cells). To encourage hair growth and enhance healing, plasma (the fluid part of the blood) loaded with platelets (PRP) can be injected into the scalp and other areas.