April 2011 in “Faculty Opinions – Post-Publication Peer Review of the Biomedical Literature” Hair cortisol is a reliable long-term stress marker during pregnancy.
3 citations
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January 2021 in “Hair transplant forum international” The Hair Diameter Index (HDI) was created to help plan hair restoration surgery after finding that visual hair density is linked to hair count and thickness, not volume.
2 citations
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January 1975 in “Archives of Dermatological Research” Certain enzymes react strongly with some hormones in rat skin during hair growth, mainly in sebaceous glands and hair sheaths.
September 2023 in “Skin Research and Technology” The paper suggests a way to diagnose male hair loss and check treatment results using a dermoscope at four specific scalp points.
July 2024 in “Journal of Investigative Dermatology” Human hair follicles have their own thyroid hormone system.
15 citations
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January 2012 in “International journal of trichology” The HairCheck® device is effective for measuring hair loss and growth in people with alopecia.
41 citations
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March 1998 in “Archives of Dermatological Research” The enzyme that changes testosterone to a stronger form is mostly found in the part of the hair follicle called the dermal papilla.
November 2022 in “The journal of investigative dermatology/Journal of investigative dermatology” The research identified specific genes that are active in the cells crucial for hair growth.
December 2023 in “International Journal of Medical Sciences And Clinical Research” Dermoscopy is a useful tool for diagnosing female pattern hair loss.
December 2022 in “JEADV Clinical Practice” Hair density and thickness decrease in specific scalp areas in people with androgenetic alopecia.
2 citations
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October 2000 The investigation found no work-related causes for employee hair loss at Equifax Payment Services, and the environment was not hazardous.
8 citations
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February 2018 in “European journal of oncology nursing” The Hair Check tool can measure hair loss, but patients' own reports are more reliable for assessing hair loss during chemotherapy.
January 2026 in “Open Science Framework” 10 citations
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January 1989 in “Archives of Dermatological Research” The method effectively analyzes human hair proteins, especially nonfilamentous ones.
7 citations
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September 2025 in “Psychoneuroendocrinology” Hair analytes decrease with storage, so analyze within six months.
5 citations
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May 2019 in “Anais Brasileiros de Dermatologia” Finger length ratios might predict risk for skin condition in males.
3 citations
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April 2025 in “International Journal of Cosmetic Science” Healthier hair and scalp improve mental wellbeing.
1 citations
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May 2016 in “Dermatologic Surgery” The document concludes that using a phototrichogram with a protractor and tapeline is a reliable and noninvasive way to measure hair loss.
July 2022 in “Journal of Investigative Dermatology” The conclusion suggests that a new system for measuring hair loss could be created using automated analysis of photographs.
November 2014 in “The Journal of Korean Medicine Ophthalmology and Otolaryngology and Dermatology” Most participants had dry skin and scalp issues, needing more research.
December 2024 in “Value in Health” A comprehensive approach is needed to accurately assess alopecia areata severity and guide treatment decisions.
January 2024 in “Institutional Repositories DataBase (IRDB)” The method accurately measures steroid hormones in hair to study hormone dynamics related to hair loss.
12 citations
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February 2006 in “Lipids” Hair texture changes with age due to varying levels of lipids.
November 2022 in “The journal of investigative dermatology/Journal of investigative dermatology” Researchers made a detailed map of gene activity for different parts of human hair follicles to help create targeted hair disorder treatments.
The method effectively measures hair elasticity and could be useful in forensics.
4 citations
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May 2021 in “Molecules” The hair test for vitamin D could be a useful alternative to blood tests, providing a longer-term vitamin D status, but more research is needed.
2 citations
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January 2016 in “Scientifica” Researchers created a reliable method to measure dexpanthenol and resorcinol in hair products.
11 citations
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September 2020 in “Steroids” A new method accurately measures steroid hormones in a few hair strands and could help study chronic stress and hair loss.
30 citations
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April 2011 in “Rapid communications in mass spectrometry/RCM. Rapid communications in mass spectrometry” Analyzing hair with this method can help understand and monitor scalp conditions and treatment effects.
May 2018 in “Actas Dermo-Sifiliográficas” The Spanish version of the Hair Specific Skindex-29 is a reliable tool for measuring quality of life in Spanish-speaking women with hair loss.