I am hypothyroid and have heriditary female patter hair loss. MD hair is the ONLY thing I have used that has helped! And believe me, I have tried it all, pills serums, shampoos , herbal concoctions even Rogain..nothing helped, so I saw the ad for MD Hair and went ahead and ordered it. After one month of use, I saw baby hairs where there had perviously been nothing but shiny scalp..each week my hair looks better and better..This is the only thing that I have found to help at all. I have only been using it for about 3 months and I'm in love..My hair is thicker, and filling in where there had been no hair at all. I cannot wait until 6 mos to see the end results!