September 2023 in “Biomedical Optics Express” New imaging techniques show testosterone delays hair growth and shrinks follicles in mice, but have limited depth for viewing.
April 2023 in “Journal of Investigative Dermatology” Honey mixture improved damaged Asian hair, making it stronger, softer, and shinier.
December 2022 in “Scientific Reports” Stem cells from whiskers can be transplanted to stimulate hair growth.
July 2021 in “Australasian Journal of Dermatology” The trichoscopy-assisted hair pull test is useful for diagnosing different types of hair loss.
July 2018 in “Elsevier eBooks” The most common cause of hair loss in children is tinea capitis, followed by alopecia areata and telogen effluvium.
April 2018 in “The journal of investigative dermatology/Journal of investigative dermatology” Electrical epilation damages hair follicles and surrounding skin, likely preventing hair regrowth.
April 2017 in “Journal of dermatological science” Researchers created a cell model to study hair growth and test hair-growth drugs.
March 2012 in “Journal of The American Academy of Dermatology” Hair casts are often mistaken for head lice, scalp pain in hair loss is linked to certain nerve factors, eyelash growth treatment is safe and effective, and nail shedding in children may follow hand-foot-mouth disease.
August 2022 in “International Journal of Molecular Sciences” DNA methylation controls lncRNA2919, which negatively affects hair growth.
14 citations
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July 2017 in “Fitoterapia” Oleanolic acid promotes hair growth by increasing cell proliferation through the Wnt/β-catenin pathway.
3 citations
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June 2017 in “Journal of Biomaterials Applications” Keratin extract from human hair was found to promote hair growth in mice.
132 citations
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September 2009 in “Experimental Dermatology” A reliable system was developed to distinguish hair growth stages, aiding in identifying hair growth promoters or inhibitors.
29 citations
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March 2015 in “Journal of Investigative Dermatology” Cyclosporine A promotes hair growth and prolongs the active growth phase in human hair follicles, but may work differently than in rodents.
25 citations
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December 2018 in “Journal of Investigative Dermatology” TRPV4 slows hair growth by affecting hair follicle cells.
24 citations
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October 2008 in “PubMed” Excessive sun exposure damages hair, causing protein loss and color changes.
20 citations
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January 2015 in “Journal of cosmetic dermatology” Older people's hair cuticles get more easily damaged and lose protective oils, especially in their 40s and 50s.
11 citations
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November 2023 in “Journal of Advanced Research” Activating ALDH2 can boost hair growth.
9 citations
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January 1989 in “Journal of Small Animal Practice” Abyssinian cats can have a hair abnormality that makes their coat look rough and dull.
7 citations
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January 2010 in “Animal” Angora goat hair grows faster and produces more protein than cashmere goat hair, and certain hormones and nutrients positively affect hair growth and protein synthesis.
6 citations
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April 1989 in “Nuclear Instruments and Methods in Physics Research Section B Beam Interactions with Materials and Atoms” Sulphur in hair follicles increases from the bulb and then levels off, while other elements vary in distribution.
5 citations
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September 2021 in “PubMed” Hair removal methods vary in effectiveness and side effects, with electrolysis being the only permanent solution.
4 citations
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August 2013 in “Pediatric dermatology” Hair casts can be treated with physical removal and special shampoos.
2 citations
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October 2018 in “Skin appendage disorders” A boy's hair that was frizzy and hard to comb returned to normal after 9 months, possibly due to genetic factors.
October 2025 in “Journal of Ethnopharmacology” Andrographolide from Andrographis paniculata promotes hair growth and could be a natural treatment for hair loss.
July 2025 in “Journal of Investigative Dermatology” BrdU speeds up hair follicle aging and reduces hair quality.
November 2024 in “Journal of Investigative Dermatology” Stimulating OR10J1 can promote hair growth and may help treat hair loss.
July 2024 in “Journal of Investigative Dermatology” Ashwagandha nanoparticles help hair grow by increasing a growth factor.
The human scalp has different types of pigment cells in hair follicles with varying abilities to produce pigment.
April 2023 in “Journal of Investigative Dermatology” Blocking casein kinase 1 in skin cells can help melanocyte precursors move better, potentially helping with conditions like vitiligo or gray hair.
January 2019 in “Proceedings for Annual Meeting of The Japanese Pharmacological Society” Nε-(carboxymethyl) lysine delays hair growth by blocking a key protein.