A woman I know (under 30 yrs of age) has been experiencing hair loss for a couple of years now at the center of the head, down. It started mostly when she started working a stressful job, which -- along with her other symptoms -- leads me to believe there's an adrenal issue that is impacting the thyroid, leading to hair loss.
However, she recently went to a lab that told her that her hair follicles are dead. It's possible there is a conflict of interest there -- they do sell hair products, including "natural" hair -- but, assuming they are right, is there ANY way to re-grow hair in those areas?
She nonetheless wants to try fixing her thyroid and adrenals to prevent any possible further loss, and to alleviate her other symptoms.