PRP used for hair loss
There are a number of studies and protocols of how to use PRP for hair loss. In one study PRP was carried out every two weeks for a total of 4 treatments and the hair growth was measured after 3 months. In this particular study the growth was 31% (22 hairs/cm2) after 3 months.
Kindly check My Hair Clinic for more information on how PRP is used for hair loss.