TLDR Topical minoxidil was effective in promoting hair growth for male pattern baldness.
In 1987, a study was conducted on two sets of identical twins to assess the effectiveness of topical minoxidil in treating male pattern alopecia. One twin from each pair was treated with 3 percent topical minoxidil, while the other twin was not treated for a period of one year in one case and for five months in the other. The results showed that the treated twin in each pair had more hair after treatment with minoxidil, suggesting that topical minoxidil was effective in promoting hair growth in cases of male pattern alopecia.
7 citations,
April 2021 in “British Journal of Dermatology” Topical tofacitinib may effectively and safely regrow facial hair in some people with alopecia areata.
4 citations,
April 2020 in “JAAD case reports” JAK inhibitors help hair regrowth but not fully effective for androgenetic alopecia.
April 2019 in “Zagazig university medical journal” 
23 citations,
August 2018 in “Anais Brasileiros De Dermatologia” Both androgenetic alopecia and alopecia areata negatively impact quality of life, with no significant difference between them.
15 citations,
May 2017 in “Journal of Dermatological Treatment” Latanoprost works better for hair growth, and combining it with betamethasone valerate is most effective.
1 citations,
January 1997 in “Archives of Dermatology” Hair loss from alopecia areata can sometimes regrow in a pattern similar to androgenetic alopecia.
Topical minoxidil was effective in promoting hair growth for male pattern baldness.
