4 citations
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July 2014 in “Journal of Investigative Dermatology”
Old people have less hair because their hair follicles don't regenerate as well, not because of fewer stem cells, and a protein called follistatin might help reactivate hair growth.
The conversation discusses difficulty in distinguishing between new hair growth and thinning hair at the temples after using microneedling and a rosemary peppermint topical for four weeks. The advice given is to wait a few months to see if the hairs grow out to determine their nature.
Hair follicles are mostly dormant but can be reactivated with treatments like minoxidil, finasteride, and microneedling. A new drug, PP405, shows promise for hair regrowth but may not be available until 2027-2028.
PP405 may reactivate dormant hair follicles but won't replace hair transplants or resurrect dead follicles. Its effectiveness, cost, and impact compared to treatments like minoxidil and finasteride are uncertain.
Hair follicles usually go dormant rather than die, and treatments like finasteride, minoxidil, and hormone therapy can sometimes reactivate them, though results vary. Complete regrowth is rare, especially in long-term bald areas, but some individuals see significant improvement with these treatments.