PRP, also known as platelet-rich plasma therapy, is a medical treatment that could help boost healing, regeneration, and growth. It’s often used to treat injured tendons, ligaments, and muscles.

PRP therapy is a three-step process. It works by drawing blood, processing it, then injecting it into the affected area.

Research states that PRP injections may benefit hair loss in several ways. For example:

  • 2022 review found that PRP may stimulate hair growth and thickness, as well as protect hair follicles from prematurely shedding.
  • 2020 review of 13 studies found that PRP may help increase hair thickness and density.
  • 2018 review found that PRP may trigger hair growth by increasing blood supply to the hair follicle.