Wow good question. I also have elevated blood cortisol and always wondered the connection. But from what I understand when the adrenals are in overdrive cranking out extra cortisol, they also are cranking out DHEA and testosterone, thus stress can cause hair loss. I dont know if my cort is elevated due to chronic scalp pain or if its adrenal. Good ways to lower it are bcomplex vitamins, Magnolia bark, Beta sistosterol and lots of rest