TLDR Latanoprost, a glaucoma drug, showed potential for promoting hair growth in bald monkeys, especially at higher doses.
In a 2001 study involving eight stump-tailed macaques, researchers found that Latanoprost, a drug typically used for glaucoma, had a dose-dependent positive effect on hair growth. The study divided the monkeys into two groups, with one group receiving a daily topical application of 50 µg/ml of latanoprost for 5 months, and the other a control substance. Later, two monkeys from each group were given a higher dose of 500 µg/ml latanoprost. The results showed minimal hair growth with 50 µg/ml of latanoprost, but moderate to marked hair regrowth with the 500 µg/ml dose, including a 5-10% conversion of vellus hairs to intermediary or terminal hairs. The control group showed no effect. The study concluded that Latanoprost could be a promising treatment for human androgenetic alopecia, warranting further evaluation.
Cited in this study
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34 citations
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December 1991 in “Annals of the New York Academy of Sciences” The conclusion is that small hair follicles cause baldness in macaques, and treatments like antiandrogens and minoxidil can prevent hair loss and promote regrowth.
46 citations
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May 1986 in “Seminars in Reproductive Medicine” Testosterone and dihydrotestosterone affect hair growth, and new techniques like the folliculogram help study it, but fully understanding hair growth is still complex.
1 citations
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September 2022 in “Journal of The American Academy of Dermatology” Baricitinib helps grow eyebrows and eyelashes in severe alopecia areata patients.
2 citations
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March 2022 in “Dermatologic Therapy” 
3 citations
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January 2015 in “Indian journal of burns” The document discusses how to restore hair in areas like eyebrows, eyelashes, moustache, beard and scalp after burns.
6 citations
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January 2013 in “Experimental dermatology” Bimatoprost increases hair growth in mice without breaking down into other substances.
81 citations
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May 2012 in “Journal of The American Academy of Dermatology” Latanoprost 0.1% may effectively treat hair loss.
50 citations
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April 2010 in “Journal of The European Academy of Dermatology and Venereology” Latanoprost can effectively treat eyelash hair loss, with 45% of patients showing hair regrowth and no reported side effects.
January 2010 in “Yearbook of Dermatology and Dermatologic Surgery” Topical latanoprost and bimatoprost ophthalmic solutions don't help eyelash growth in patients with alopecia areata.
55 citations
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April 2009 in “Journal of The American Academy of Dermatology” Topical latanoprost and bimatoprost eye solutions don't help eyelash growth in people with alopecia areata.
33 citations
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January 2002 Latanoprost, a glaucoma drug, showed potential for promoting hair growth in bald monkeys, especially at higher doses.
