March 2024 in “Molecules/Molecules online/Molecules annual” Enzymatically extracted bear oil has more unsaturated fats and significantly increases hair growth in mice.
30 citations
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March 2017 in “PLoS ONE” Sulfur slightly improved diet estimates for grizzly bears, but hair growth timing varied, affecting results.
February 2013 in “Journal of the American Academy of Dermatology” Certain gene variations may increase the risk of alopecia, and platelet-rich plasma treatment can improve hair density in those with hair loss; a rare case of facial Becker's nevus was linked to uneven beard growth.
34 citations
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July 1993 in “The journal of investigative dermatology/Journal of investigative dermatology” Human hair growth is influenced by androgen hormones, and red deer mane follicles have similar hormone receptors.
4 citations
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November 2016 in “Dermatologic Therapy” Topical tretinoin may increase beard hair density.