60 citations
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February 1992 in “British Journal of Dermatology” Serum from alopecia patients does not stop hair growth in grafted skin on mice.
33 citations
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January 1997 in “Journal of Investigative Dermatology” July 2022 in “British Journal of Dermatology” 30 citations
,
October 2014 in “Experimental Dermatology” Leptin from skin fat can slow hair growth during certain phases.
34 citations
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August 2011 in “Journal of Natural Medicines” Puerariae Flos extract may help treat hair loss by blocking a hair loss-related enzyme and promoting hair growth.
18 citations
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February 2021 in “Archives of Dermatological Research” Physcion may help treat hair loss by blocking an enzyme linked to baldness.
33 citations
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December 1999 in “Journal of Investigative Dermatology Symposium Proceedings” 
58 citations
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October 2016 in “Journal of Investigative Dermatology” Activating Nrf2 protects human hair follicles from oxidative stress and helps prevent hair growth inhibition.
May 2025 in “OPAL (Open@LaTrobe) (La Trobe University)” Jamogenin and other compounds may help treat hair loss by inhibiting 5-alpha reductase.
April 2025 in “Research Square (Research Square)” Hemp seed exosomes may help prevent hair loss caused by DHT.
January 2023 in “Journal of orthopedics & bone disorders” Platelet-rich plasma may not be very effective for bone healing and hair growth due to a substance it contains that blocks these processes.
1 citations
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April 2024 in “Journal of Dermatological Science” 
137 citations
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September 2005 in “Proceedings of the National Academy of Sciences of the United States of America” The HR protein helps hair grow by blocking a hair growth inhibitor, aiding in hair follicle regeneration.
May 2019 in “International journal of advanced chemistry” The green cream safely slowed hair growth by 25%.
77 citations
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February 2001 in “Journal of Dermatological Science” HGF activator helps convert HGF to its active form, promoting hair growth.
215 citations
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November 2006 in “Journal of The American Academy of Dermatology” Dutasteride more effective for hair growth, but has more side effects than finasteride.
48 citations
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June 2013 in “Journal of Dermatological Science” Valproic acid may help hair grow and could be a safe treatment for hair loss.
32 citations
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April 2016 in “Journal of Investigative Dermatology” STAT5 activation is crucial for starting the hair growth phase.
12 citations
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July 2020 in “Aging” The protein EZH2 blocks microRNA-22, increasing STK40 protein, which helps hair follicle stem cells change and grow hair.
11 citations
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March 2015 in “Life sciences” Vitamin D3-activated cell byproduct promotes hair growth in mice by increasing blood vessel growth.
4 citations
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April 1999 in “Dermatologic Clinics” Androgens, like DHT, affect hair growth and treatments like finasteride may help.
2 citations
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June 2005 in “Clinical Oncology” A man's bald spot grew hair after starting cancer treatment with gefitinib.
1 citations
,
April 2020 in “Clinical, Cosmetic and Investigational Dermatology” Acyclovir cream may slow down hair growth, suggesting it could be a new treatment for excessive hairiness.
January 2024 in “International Journal of Zoological Investigations” The herbal oil with Helianthus annuus and Martynia annua seeds promotes significant hair growth.
August 2024 in “Cosmetics” Peanut callus extract helps grow hair and prevent hair loss.
May 2023 in “Journal of Investigative Dermatology” Blocking DPP4 can potentially speed up hair growth and regeneration, especially after injury or in cases of hair loss.
November 2022 in “Cosmetics” Red pigmented rice, like Sang-Yod rice, could help promote hair growth and prevent hair loss.
April 2022 in “Biomedicine & Pharmacotherapy” CXCL12 protein slows down hair growth through its receptor CXCR4. Blocking this can potentially increase hair growth.
March 2005 in “Journal of The American Academy of Dermatology” Two cosmetic lotions improved hair growth and had better cosmetic effects than 2% minoxidil.
25 citations
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August 1992 in “In vitro cellular & developmental biology” The new system can grow hair in the lab and test hair growth treatments.