Hair can't be as strong as Rapunzel's because it's impractical to scale up due to defects.
100 citations
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December 2002 in “Journal of biological chemistry/The Journal of biological chemistry” Researchers mapped and categorized specific keratin-associated protein genes on human chromosome 21q22.1.
19 citations
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April 2015 in “International Journal of Molecular Sciences” The research identified genes and pathways important for sheep wool growth and shedding.
February 2015 in “American journal of medical and biological research” Balding hair follicles have less growth-promoting factors and more inhibitory factors, leading to hair loss.
170 citations
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November 2007 in “The journal of investigative dermatology/Journal of investigative dermatology” Skin can heal wounds without hair follicle stem cells, but it takes a bit longer.
67 citations
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December 1990 in “The journal of cell biology/The Journal of cell biology” Researchers found genes for cysteine-rich proteins that form the protective layer of hair in humans and sheep.
62 citations
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August 2006 in “Journal of Chromatography B” Modern techniques have improved the understanding of keratin proteins, revealing their roles in various cells and potential in disease diagnosis.
15 citations
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May 2013 in “International Journal of Cosmetic Science” Different ethnic hair types have unique nanoscopic and molecular features despite having the same basic keratin structure.
14 citations
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December 2016 in “PloS one” Keratin 26 affects cashmere goat hair growth and is influenced by various treatments.
11 citations
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March 2021 in “The journal of investigative dermatology/Journal of investigative dermatology” A gene mutation causes early keratinocyte maturation leading to hair loss in Olmsted syndrome.
9 citations
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January 2015 in “Current problems in dermatology” Scientists have found specific genes linked to different hair loss conditions, which could lead to new treatments.
7 citations
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November 2006 in “Journal of immunological methods” The method can help diagnose and monitor diabetes by analyzing hair.
1 citations
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January 2019 in “PubMed” cgVEGF164 boosts hair follicle growth in mice.
February 2025 in “International Journal of Cosmetic Science” A new amino acid derivative, ATS, improves hair texture and moisture, making it easier to straighten curly hair.
1 citations
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January 2021 in “Springer Proceedings in Materials” Researchers developed a new method to clearly see and label hair proteins with minimal errors using advanced freezing and microscopy techniques.
83 citations
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May 2011 in “Experimental Dermatology” Sheep have 17 keratin genes, similar to humans, but with different expression patterns affecting wool and hair.
61 citations
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July 2011 in “PLOS ONE” Spermidine may help reduce hair loss and deserves further testing as a treatment.
28 citations
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October 1985 in “The Journal of Cell Biology” Researchers isolated and identified structural components of human hair follicles, providing a model for studying hair formation.
11 citations
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June 2013 in “PubMed” The automated flat iron can permanently straighten hair without chemicals, especially at 154°C, and silicone improves the results.
3 citations
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January 2013 in “Journal of cosmetics, dermatological sciences and applications” HAIRCARECUBE TM (HCC) helps hair products work better by getting active ingredients deeper into the hair.
2 citations
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July 1994 in “Journal of Dermatological Science” Grafted human scalp samples on mice can produce human hair, useful for studying hair genetics.
April 2026 in “BMC Genomics” Hair type differences in cashmere goats are linked to keratin and cytoskeletal organization.
63 citations
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February 2017 in “ACS biomaterials science & engineering” Polydopamine is a safe, effective, and permanent hair dye that turns gray hair black in one hour.
68 citations
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December 2010 in “The journal of investigative dermatology/Journal of investigative dermatology” HOXC13 is essential for hair and nail development by regulating Foxn1.
53 citations
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July 2016 in “Cosmetics” Future hair cosmetics will be safer and more effective.
14 citations
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September 2019 in “Forensic Science International Genetics” Hair keratin proteins can be reliably identified in hair as short as 0.12 cm, with 0.5 to 2 cm being the best length for analysis.
5 citations
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February 2019 in “PloS one” Bald thigh syndrome in sighthounds is caused by structural defects in hair shafts due to downregulated genes and proteins.
5 citations
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January 2017 in “Elsevier eBooks” The document concludes that cosmetics need biocompatible, eco-friendly ingredients due to aging populations and demand for effective products.
4 citations
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June 2022 in “Journal of cleaner production” New eco-friendly method strengthens and sets hair using light and causes less damage.
December 2025 in “Biopolymers” Heat worsens damage in chemically treated hair, especially bleached and straightened hair.