I am 43 years old and presently have hyperthyrodism, I am not losing excess weight, as a matter of fact I am on a low carb diet to keep my weight down, but the back of my hair has been thinning out very badly, even while on PTU. I have been using the HF37 vitamins for 4 months now and that is defintelty not working. In two weeks I am schedule to do a lobectomy. The question is... is there any hope of my hair growing back after the surgery? Or, will it continue to fall out after the surgery? Is my hair loss due to the hyperthyrodism? If, so, then what can I do to stop my hair from falling out?