Certain short peptides can increase root hair growth in tobacco plants.
June 2014 in “Professional Beauty”
March 2026 in “Food Science and Biotechnology” Blue honeysuckle fruit extract helps hair grow by activating a specific signaling pathway.
10 citations
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January 2013 in “International Journal of Trichology” More vellus hairs in frontal scalp indicate early female pattern hair loss.
56 citations
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June 2010 in “Clinical and experimental dermatology” Coudability hairs are useful markers for alopecia areata activity.
January 2016 in “프로그램북(구 초록집)” Hormones and neuropeptides affect hair growth, with androgens having opposite effects on beard and scalp hair.
January 2004 in “Linchuang pifuke zazhi” Black hairs have more pigment-related genes, while gray hairs have more keratin-related genes.
March 2003 in “Clinics in Dermatology” 2 citations
,
March 1942 in “JAMA”
15 citations
,
July 2004 in “Journal of morphology” Monotreme hair structure and protein distribution are similar to other mammals, but their inner root sheath cornifies differently, suggesting a unique evolution from reptile skin.
2 citations
,
July 2019 in “Indian dermatology online journal” A 17-year-old girl and her brothers have a rare hair condition with long eyelashes, thick eyebrows, and easily pluckable hair.
December 2020 in “한국인그리에학회지” Astringent persimmon fruit extract may help hair grow longer and cover more area without increasing the number of hair follicles.
17 citations
,
June 1990 in “PubMed” Hair varies in size and features depending on body region.
2 citations
,
August 2020 in “Natural Product Communications” A mix of Platycladus orientalis leaf extract and alpha-terpineol helps mice grow hair by increasing growth factors and cell growth.
41 citations
,
May 2005 in “International Journal of Cosmetic Science” Human hair contains various lipids that vary among individuals and help protect the hair.
August 2018 in “Journal of Investigative Dermatology” Humans evolved to have less hair and more sweat glands than chimpanzees and macaques.
February 2024 in “Frontiers in plant science” Peps help Arabidopsis plants grow more root hairs by affecting specific genes and calcium signaling.
2 citations
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February 2023 in “International journal of molecular sciences” Body hairs can be used in forensic science and toxicology like scalp hair.
January 2005 in “Chinese Journal of Veterinary” Hairless mice lose hair by 3-4 weeks, develop thicker, folded skin, and show pigmentation differences.
December 2022 in “Scientific Reports” Stem cells from whiskers can be transplanted to stimulate hair growth.
12 citations
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February 2006 in “Lipids” Hair texture changes with age due to varying levels of lipids.
April 2018 in “Journal of Investigative Dermatology” Researchers found a substance in chicken egg yolk that helps hair grow.
38 citations
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July 1993 in “Journal of Investigative Dermatology” July 1993 in “Journal of Radioanalytical and Nuclear Chemistry” Mouse hair element patterns vary, making it unreliable for tracking time.
December 2025 in “ILDS-DEV” Asian patients show different trichoscopy features compared to Caucasians, like thicker hair and different alopecia signs.
17 citations
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February 2011 in “International Journal of Cosmetic Science” Grey hair is wilder, drier, and less manageable than pigmented hair.
1 citations
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August 2024 in “Journal of Morphology” Mammary glands evolved from hair organs in Monodelphis domestica.
May 2023 in “Elsevier eBooks” Keratin peptides in hair may help identify gender and ethnicity, but more research is needed.