Platelet-rich plasma (PRP) therapy is a treatment option that involves injecting a concentrated solution of platelets and plasma (a component of blood) into the scalp. PRP is thought to stimulate hair growth by providing growth factors and other nutrients to the hair follicles, which may help to improve their health and function. There is some limited evidence to suggest that PRP therapy may be effective for treating hair loss. However, the evidence is not strong and more research is needed to fully understand the effectiveness of this treatment.