I've been on HRT which includes a Armour Thyroid supplement to keep it in balance for many years before PMR. My doctor just made a few changes in my HRT to help offset the side effects of Prednisone. He is also the person who suggested Nutrafol. I'm sure the Nutrafol promoted hair growth. I can't say for sure if it stopped the shedding. It's another 4 capsules daily so it does add to the pile we're popping!