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What is PRP?

Platelet rich plasma (PRP) is concentrated blood plasma which contains approximately five times the number of platelets found in normal circulating blood. In addition, it contains platelet derived growth factor (PDGF), vascular endothelial growth factor (VEGF), transforming growth factor (TGF) and other bioactive proteins that aid in wound healing and possibly hair growth.

Growth factors in platelet rich plasma (PRP) have been used to facilitate wound healing. Recently, studies have suggested that PRP may also serve as a safe and effective treatment option for male and female pattern hair loss.

Human blood is comprised primarily of red blood cells (RBC), as well as white blood cells (WBC), platelets, and plasma. By initiating the first step of coagulation, platelets are the key to the body’s ability to heal wounds. It is thought that by increasing the platelet count in a wounded area, the body’s healing to that area would be accelerated – explaining the use of PRP in wound healing. Its effects on promoting hair growth make it useful for the medical treatment of hair loss.

Bernstein Medical PRP process

PRP Treatments at Bernstein Medical

At Bernstein Medical we use the XCELL PRP System. This is a modification of the single centrifuge technique that allows the active biologic factors of serum to be administered at the most effective concentration.

If PRP hair loss therapy is appropriate, we can begin your treatment at the time of your consultation. We will administer the next two treatments at 6-week intervals. You will be asked to return 3 months later. At this visit (6 months from your first treatment) your response will be assessed. If you show improvement, follow-up treatments will be given twice yearly depending upon your progress.

The treatments are administered by a Bernstein Medical physician and take about a half hour to 45 minutes. For some patients, the injections may be uncomfortable. For those patients, we offer local anesthesia prior to the injections which helps to reduce the discomfort. Patients are monitored photographically to assess the benefits of therapy. We will modify your treatment schedule based on your individual response to therapy. The physicians at Bernstein Medical have the knowledge to know when PRP for hair loss is appropriate and the skill to inject the proper quantity of PRP at just the right depth to achieve the desired result — a skill that cannot be overstated.

Before and After Photos of PRP Hair Loss Treatment

Patient HNI - Before and After PRP TreatmentPatient HNI before PRP treatment (left) and 1 year after his first PRP session (right)

Patient HNI is a 30-year-old male who has had four PRP treatments. The “after” photo was taken one year after his first treatment and 6 months after his fourth treatment. The patient has been on finasteride and minoxidil 5% for three years.

PRP for Hair Loss Patient CMR before treatment (left) and 7 weeks after his second PRP session (right)PRP Patient CMR before treatment (left) and 7 weeks after his second PRP session (right)

Patient CMR has had two PRP therapy sessions. The “after” photo was taken three months after his first treatment and seven weeks after his second treatment. The patient has been on finasteride for over 15 years.

PRP for Hair Loss Patient CRZ before treatment (left) and 3 months after a third PRP treatment (right)PRP Patient CRZ before treatment (left) and 3 months after a third PRP treatment (right)

Patient CRZ presented to our office requesting platelet rich plasma (PRP) injections to his scalp. He is not taking finasteride. He underwent three PRP treatments to his crown. The second photo is approximately 5½ months following the initial PRP hair loss treatment, and 3 months following the third PRP treatment. He is demonstrating improvement in hair thickness in less than 6 months, and further improvement is expected.

PRP for Hair Loss Patient YCA before treatment (left) and 6 weeks after a second PRP treatment (right)PRP Patient YCA before treatment (left) and 6 weeks after a second PRP treatment (right)

Patient YCA (pictured above) presented to our office requesting platelet rich plasma (PRP) injections to his scalp. He has been taking finasteride 1.25 mg for over 5 years and he has recently noticed his hair thinning while still on the medication. He underwent two PRP treatments to his crown spaced 6 weeks apart. The second photo is approximately 3 months following the initial PRP treatment, and 6 weeks following the second PRP treatment.

PRP Patient UMZ - Before and AfterPRP Patient UMZ before treatment (left) and after 3 PRP treatments (right)

Patient UMZ is a 43 year old male who has been on finasteride for over 6 years. He has noticed recent thinning while on finasteride. He has undergone 3 PRP treatments over the past approximately 6 months.

PRP for Hair Loss

Obtaining PRP for Hair Loss Through CentrifugationThe Platelet Rich Plasma (PRP) commonly used in hair restoration is “autologous,” meaning that it is derived from the patient’s own blood. To obtain PRP, a patient’s blood is spun in a centrifuge to separate the solid from liquid components and platelet activators, such as thrombin, calcium chloride and sometimes collagen, are added. The separated “solid” portion of the blood is PRP (platelet rich plasma).

There are commercially available systems for PRP hair loss treatment. These include XCell PRP, Cydomedix, Emcyte Pure PRP, Angel system, and Harvest system. PRP is sometimes combined with A-Cell, although the benefit of this combination is speculative.

PRP is then placed into a syringe and reintroduced into the treatment site i.e., either the surgical site or an area of hair loss. PRP be can sprayed onto a recipient area during and after a hair transplant, laid into the donor incision, or injected directly into a balding scalp. Prior to injecting PRP, doctors often create a ring-block of local anesthesia with 1% lidocaine.

When used to stimulate hair growth most doctors schedule injections at intervals of 1 to 9 months. Some improvement (in reversing miniaturization) can be expected in the first 2-6 months. The treatments must be continued periodically to maintain any improvement.

Mechanism of Action

For the medical treatment of hair loss, practitioners use PRP to stimulate the growth of follicles, thereby reversing the hair miniaturization seen in androgenetic alopecia (common baldness).

It is conjectured that the introduction of platelets and white blood cells through platelet rich plasma (PRP) can amplify the body’s naturally-occurring wound healing mechanism. It is also proposed that PRP can actually stimulate the stem cells (dermal papilla) of the newly transplanted hair follicles. Other doctors feel that during a hair transplant procedure, the body’s normal production of bioactive growth factors is optimal for healing and subsequent growth and that PRP for hair loss gives no additional benefit.

What are the Indications for PRP for Hair Loss?

PRP is used in many areas of medicine, including the acceleration of healing of tendon injuries, the treatment of osteoarthritis, in some aspects of dental work (i.e. jaw reconstruction), and in cardiovascular medicine. The concentrated form of plasma has been shown to accelerate wound healing and tissue repair and, thus, could potentially benefit hair restoration procedures.

In hair transplantation, PRP can be injected into or sprayed on the recipient site area, theoretically, to stimulate the healing of the transplanted grafts and into the donor area to facilitate healing of the donor incision and potentially minimize scar formation.

In the medical treatment of male and female pattern baldness (androgenetic alopecia), PRP can be injected into the balding scalp to potentially stimulate thin (miniaturized) hair to grow into thicker (terminal) hairs. Patients with thinning, but not totally bald, areas would be the best candidates.


PRP for hair loss is a relatively new treatment with a limited number of scientific studies to show its efficacy. The long-term benefits of PRP treatments for hair loss are not yet known. All patients receiving PRP treatments at Bernstein Medical are followed closely to determine effectiveness and if other therapeutic modalities may be needed.


  1. Miao, Y., et al. Promotional effect of PRP on hair follicle reconstitution in vivo. Derm Surg. 2013; 39:1869-1876.
  2. Greco, J., and R. Brandt. Preliminary experience and extended applications for the use of autologous platelet rich plasma in hair transplantation surgery. Hair Transplant Forum Int’l. 2007; 17:131-132.
  3. Greco, J., and R. Brandt. The effects of autologous platelet rich plasma and various growth factors on non-transplanted miniaturized hair. Hair Transplant Forum Int’l. 2009; 19:49-50.
  4. V. Cervelli, S. Garcovich, A. Bielli, G. Cervelli, et al. “The effect of autologous activated platelet rich plasma (AA-PRP) injection on pattern hair loss: clinical and histomorphometric evaluation,” BioMed Research International. Volume 2014.
Updated: 2020-09-16 | Published: 2016-07-29