PRP (platelet-rich plasma) hair loss injections are a form of treatment for hair loss and thinning hair. The treatment involves extracting a small amount of blood from the patient and then processing it in a centrifuge to separate out the platelets and plasma. The concentrated platelets and plasma are then re-injected into the scalp in the areas of hair loss.

The idea behind PRP injections is that the platelets and plasma contain growth factors that can stimulate hair growth. Some studies have shown that PRP can be effective in promoting hair growth, but more research is needed to confirm its effectiveness.