8 citations
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March 1942 in “Journal of Endocrinology” Thyroid hormone treatments help thyroidectomized rats grow normally.
28 citations
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March 1942 in “Journal of Endocrinology” Male rats grow hair faster than females, and certain hormones can slow or slightly increase hair growth, but not significantly beyond natural rates.
January 2020 in “Der Pharmacia Lettre” Nanoparticle-based herbal remedies could be promising for treating hair loss with fewer side effects and lower cost, but more research is needed.
349 citations
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January 2005 in “The FASEB journal” Human skin can make serotonin and melatonin, which help protect and maintain it.
September 2025 in “Journal of Phytonanotechnology and Pharmaceutical Sciences” Licorice has health benefits but can also cause side effects, so it should be used carefully.