The deal is this: Blood is drawn, usually from the client’s arm, then placed in a centrifuge in order to separate the plasma and the platelets from red blood cells. The resulting liquid is called platelet-rich plasma, or PRP. The plasma contains protein and other nutrients that are supposed to help stimulate skin cell growth and collagen. Then that material is either applied topically or injected into the face using microneedling techniques, which essentially involves puncturing the skin many times with super-tiny needles. The theory is that the holes help the growth factors and other nutrients get into deeper layers of the skin.