Platelet-rich plasma is a the latest technique to boost thinning hair, halt hair loss and to improve graft survival during hair transplant surgery. It can be performed under an hour, with a special PRP Kit which is mixed with your own plasma. The growth factors help healing, and stimulate the scalp so that hair is stronger and healthier. The scalp is first numbed using an anesthetic cream, and Dr. OBT takes 20-30 minutes to inject all across the scalp. One session every 6 weeks is sufficient, per year.