Q: Do you administer PRP (Platelet Rich Plasma) during a hair transplant? — R.W., Manhattan, NY

A: The wounds created in the hair transplant procedure (recipient site creation) promote blood platelet migration and the activation of growth factors making PRP therapy unnecessary for the actual surgery. That said, doctors may wish to use PRP for areas of the scalp that are thinning, but were not addressed by the hair transplant. An example might be using PRP for the crown if the doctor only transplanted hair to the front part of the scalp.