33 citations
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January 2017 in “Conservation physiology”
Measuring reproductivehormones in brown bear hair could help identify their sex and reproductive state, but better collection methods or lab techniques are needed.
Hair loss is influenced by genetics and sensitivity to hormones like DHT. Treatments like Minoxidil and finasteride are commonly used, and baldness persists as it doesn't affect reproductive success.
DHT promotes beard growth but causes scalp hair loss due to inflammation and fibrosis. Treatments like finasteride and minoxidil help with hormonal signals and blood flow but don't address underlying inflammation.
Finasteride may affect neurosteroids, impacting mood and sexual function, with varied user experiences. Some report side effects like depression and sexual dysfunction, while others find it effective for hair retention or prefer alternatives like Dutasteride or topical treatments.
Dutasteride takes 1-3 months to affect scalp DHT levels, not just a week. The prostate absorbs Dutasteride faster than the scalp due to different vascular networks and enzyme densities.
Baldness is not an evolutionary disadvantage because it occurs after reproductive age. Treatments like Minoxidil and Finasteride are used for androgenetic alopecia but don't address the root cause.