December 2012 in “Faculty Opinions – Post-Publication Peer Review of the Biomedical Literature” There are several promising treatments for hair loss, including dutasteride, latanoprost, ketoconazole shampoo, anti-androgens, laser/light treatment, and platelet-rich plasma, but more research is needed.
2 citations
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January 2012 in “Hair therapy & transplantation” DDAIP-HCl significantly increases minoxidil absorption into the skin.
23 citations
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January 2020 in “Frontiers in Pharmacology” Dihydrotestosterone affects hair growth by changing the Wnt/β-catenin pathway, with low levels helping and high levels hindering growth.
January 2013 in “프로그램북(구 초록집)” The Hair660™ light therapy device effectively and safely improves hair density in people with androgenetic alopecia.
22 citations
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July 1990 in “Acta Dermato Venereologica” High levels of testosterone and dihydrotestosterone inhibit hair cell growth, while high levels of estradiol promote it.
2 citations
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May 2024 in “International Journal of Medical Arts” Diphenylcyclopropenone (DPCP) is more effective than anthralin for treating resistant alopecia areata.
March 2012 in “DOAJ (DOAJ: Directory of Open Access Journals)” Topical finasteride didn't significantly reduce facial hair, but patients felt it helped.
September 2011 in “European journal of cancer” 
July 2020 in “International journal for research in applied science and engineering technology” The herbal shampoo made from local plants can reduce hair loss and promote hair growth.
November 2021 in “SPAST Abstracts” The EFH-SLM cream is more effective and gentler for treating excessive hair growth in women.