Sheep can lose wool quickly due to stress, but it doesn't cause itching or pain.
9 citations
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July 2014 in “Skin research and technology” Stretching damages Caucasian hair's structure more easily than Asian hair.
4 citations
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July 2022 in “International Journal of Cosmetic Science” Hair moisture behavior helps tell apart different chemical treatments and reveals insights into hair structure.
42 citations
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January 2011 in “Journal of Biomedical Optics” Infrared and Raman imaging can non-destructively analyze hair structure and help diagnose hair conditions.
May 2023 in “Accounts of chemical research” New methods can better classify curly hair types and lead to improved hair care products.
25 citations
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May 2019 in “Heliyon” Hair treatments cause significant structural changes, especially with excessive heat, regardless of ethnicity.
January 1992 in “Biology of the Cell” Retinoic acid receptors are important for hair follicle development.
June 2025 in “British Journal of Dermatology” ALUDWIG can help standardize female hair loss assessment from a single image.
January 2019 in “Global Dermatology” Genetic hair shaft abnormalities can be seen with microscopes and often affect scalp hair.
49 citations
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July 2019 in “British Journal of Dermatology” Wnt signaling is important for the change from the resting phase to the growth phase in human hair cycles.
5 citations
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December 2018 in “Journal of The American Academy of Dermatology” Some hair products can create false signs on scalp examinations, leading to wrong diagnoses.
April 2024 in “Cosmetics” Wigs help improve self-esteem and quality of life for people with hair loss from alopecia areata.
February 2013 in “Journal of the American Academy of Dermatology” Follicular red dots can appear where alopecia areata and vitiligo overlap.
3 citations
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October 2006 in “Journal of dermatology” X-ray microscopy can non-invasively show hair structure changes after treatments, but it's less detailed than TEM and needs improvement.
20 citations
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July 1988 in “Clinics in dermatology” Thioglycolate lotions are the most popular method for permanent waving and hair straightening.
11 citations
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August 2017 in “American Journal of Dermatopathology” EVG staining helps tell apart follicular scars from follicular streamers, aiding in diagnosing different types of hair loss.
November 2021 in “CRC Press eBooks” Fibrosing alopecia in a pattern distribution is a new type of scarring hair loss that resembles common baldness and an autoimmune skin disease.
January 2018 in “Indian Dermatology Online Journal” Trichoscopy can help tell the difference between artificial hair fibers and other scalp artifacts.
July 2025 in “Journal of Investigative Dermatology” Wnt signaling helps regenerate hair follicles in wounds by reducing skin cell sensitivity to mechanical stress.
24 citations
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December 1957 in “Experimental Cell Research” The glassy layer of hair follicles has different fibril sizes and arrangements in guinea pigs and young mice.
22 citations
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July 2016 in “PLoS ONE” Certain miRNAs and genes influence wave patterns in Hu sheep hair follicles.
The document concludes that the new model realistically simulates male baldness and could be useful for medical purposes and entertainment.
December 2019 in “Journal of Cosmetic Dermatology” A new training model using an orange helps surgeons practice parietal whorl hair transplants effectively.
April 2023 in “Journal of Investigative Dermatology” Covering a wound can stop hair growth by promoting scarring, but boosting a process called Wnt signaling can help hair grow back even when the wound is covered.
18 citations
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January 2008 in “Sen'i Gakkaishi” Thioglycolic acid and L-cysteine change hair structure differently during perms, affecting hair strength and curling efficiency.
August 2005 in “Microscopy and Microanalysis” Polymethylene wax in hair relaxers makes hair smooth and shiny with less damage.
January 2021 in “International journal of dermatology, venereology and leprosy sciences” Trichoscopy shows black dots, yellow dots, and empty follicles are common in Alopecia Areata, with broken and exclamation mark hair as typical patterns.
15 citations
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August 2015 in “Scanning” Corkscrew and cigarette-ash-shaped hairs in tinea capitis are caused by internal hair degradation and external resistance.
March 2015 in “Journal of Visualized Experiments” A new method measures mouse hair loss using shades of gray.
Hair properties change under electromagnetic fields and are influenced by individual characteristics and the environment.