TLDR Most Facebook posts about hair loss treatments are promotional and not medically supported, with better quality information found on YouTube.
In August 2020, researchers analyzed 133 Facebook pages and 750 posts related to hair loss treatments and found that most content was promotional, focusing on products, clinics, or fundraising, with only 3-13% supported by medical evidence and receiving low user engagement. Non-FDA approved products were more expensive than FDA-approved treatments like minoxidil, despite less online information. Google searches for minoxidil and finasteride were increasing, suggesting patients were looking for information on platforms like YouTube, which had higher quality content. Hair transplant posts, particularly "before & after" photos, were popular on Facebook and Instagram, but some set unrealistic expectations. The study concluded that Facebook hair loss content was of lower quality compared to YouTube, and emphasized the need for physicians to guide patients towards accurate online information.
Cited in this study
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7 citations
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March 2021 in “Journal of Cosmetic Dermatology” Minoxidil and Finasteride are the most popular hair loss treatments, with rising interest in other options, and economic or health crises can change what treatments people prefer.
8 citations
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October 2020 in “Journal of Cosmetic Dermatology” More people are searching for hair transplants online, preferring Follicular Unit Excision over Follicular Unit Transplant. There's also a rise in female patients and interest in beard, eyebrow transplants, and non-surgical treatments like platelet rich plasma.
5 citations
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September 2020 in “Dermatologic Therapy” Most YouTube hair loss treatment videos are popular but often biased and lack reliable sources.
290 citations
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January 2018 in “Journal of The American Academy of Dermatology” Alopecia areata is an autoimmune condition causing hair loss, influenced by genetics, stress, and diet, and may be prevented by a high soy oil diet.
112 citations
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October 2005 in “Mayo Clinic Proceedings” Minoxidil and finasteride can slow hair loss and stimulate regrowth, but won't restore all lost hair or reverse complete baldness.
59 citations
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March 2021 in “Journal of The American Academy of Dermatology” Oral minoxidil promotes hair growth but may cause side effects; needs monitoring.
25 citations
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October 2018 in “Clinical and Experimental Dermatology” Combined microneedling and minoxidil improves hair growth more than minoxidil alone.
May 2015 in “Journal of The American Academy of Dermatology” 5% minoxidil foam helps women with thinning hair.
8 citations
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November 2014 in “PubMed” 
November 2009 in “Cambridge University Press eBooks” Minoxidil and finasteride combined can effectively treat hair loss.
30 citations
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November 2008 in “Facial Plastic Surgery” The conclusion is that the best approach for treating Female Pattern Hair Loss is a combination of different treatments.
12 citations
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February 2003 in “PubMed” 
1 citations
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September 2002 in “PubMed” Minoxidil helps stimulate hair growth and reduce hair loss in women with androgenic alopecia.
127 citations
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July 1996 in “Journal of The American Academy of Dermatology” Minoxidil shortens baldness from chemotherapy by 50.2 days without significant side effects.
