January 2010 in “EPub Bayreuth (University of Bayreuth)” The study aimed to enhance physical measurement methods for examining micro-fiber surfaces, focusing on changes in hair surfaces due to different shampoo formulations. It investigated the physical changes at macro, micro, and nanoscale levels, emphasizing the friction and interaction properties of hair treated with hair care products. The research specifically examined three commercially available cationic polymers (Polyquaternium-10, Polyquaternium-87, and Jaguar C-13S) and their interaction with the negatively charged hair surface. A modified Universal Surface Tester provided results on hair friction properties, showing that all three polymers reduced friction forces, with Polyquaternium-87 achieving the highest reduction. The study also developed methods to separate various interaction forces, using a modified atomic force microscope to detect interactions between individual hairs.
Hairless mammals evolved quickly in both gene and non-gene areas related to skin and hair.
2 citations
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August 1994 in “Archives of dermatology” A 19-month-old boy with a rare hair disorder showed mild improvement with treatment, but his family chose gentle hair care due to limited success.
January 2024 in “Institutional Repositories DataBase (IRDB)” The method accurately measures steroid hormones in hair to study hormone dynamics related to hair loss.
3 citations
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September 2017 in “The journal of investigative dermatology/Journal of investigative dermatology” CBD can either promote or inhibit hair growth depending on the concentration used.
April 2023 in “Journal of Investigative Dermatology” A protein called MPZL3 in mitochondria slows down hair growth and could be a target for treating hair growth disorders.
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.
March 2026 in “Journal of Skin and Sexually Transmitted Diseases” Long hair can cause hair loss in the middle of the scalp, and cutting it shorter helps.
30 citations
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August 1993 in “PubMed” IL-1 alpha stops hair follicle growth and hair production.
August 2024 in “Cosmoderma” 3D-printed hair follicles could revolutionize hair loss treatments by providing unlimited hair grafts.
October 2021 in “Research Square (Research Square)” Hair follicle stem cells in hairpoor mice are disrupted, causing hair loss.
2 citations
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April 2017 in “PubMed” Fat cells near hair follicles may affect hair growth and could help treat baldness.
1 citations
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January 2015 in “Journal of Society of Cosmetic Chemists of Japan” Keratin film can effectively measure hair texture and adsorption properties.
25 citations
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October 1975 in “Journal of Cutaneous Pathology” Hair growth in alopecia areata is hindered due to impaired cell activity in the surrounding tissue.
April 2017 in “Journal of Investigative Dermatology” Early and late matrix progenitors in hair follicles create different cell layers, with early ones forming the companion layer and later ones forming the inner root sheath and hair shaft.
46 citations
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August 2006 in “Mechanisms of Development” Runx1 is crucial for proper hair structure and development.
14 citations
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January 2001 in “Clinical chemistry” Hair can be used to measure cancer-related chemicals noninvasively.
136 citations
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June 2006 in “Journal of Dermatological Science” PDGF isoforms can promote and sustain hair growth.
February 2024 in “Experimental Dermatology” IGFBP-rP1 could be a new treatment for a common type of hair loss.
28 citations
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December 2010 in “Langmuir” Hair fibers interact through classical forces, which are influenced by treatments and products, important for hair care and other applications.
August 2025 in “International Journal of Dermatology” Hair loss significantly influences medical decisions, affecting treatment choices and emotional well-being.
7 citations
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May 2007 in “Nutrition Journal” Hair pluckability is not a reliable method for assessing nutrition.
81 citations
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May 1986 in “Journal of Investigative Dermatology” 
10 citations
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January 2016 in “PLOS ONE” Researchers found 44 proteins that change during different hair growth stages and may be important for hair follicle function.
82 citations
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September 2018 in “Nature Communications” A certain smell receptor in hair follicles can affect hair growth when activated by a synthetic sandalwood scent.
January 1997 in “Fundamental & Clinical Pharmacology” 
1 citations
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January 2020 in “Indian Dermatology Online Journal” Pigtail hair is a sign of new hair growth and should be recognized in hair loss conditions like acute telogen effluvium.
157 citations
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April 1994 in “Clinical endocrinology” Androgens can cause hair growth in some areas and hair loss on the scalp.
June 2025 in “Jurnal Bumigora Information Technology (BITe)” Naive Bayes algorithm can help predict hair loss risk early.
212 citations
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September 2015 in “Journal of Investigative Dermatology” The document provides a method to classify human hair growth stages using a model with human scalp on mice, aiming to standardize hair research.