January 2023 in “Research Square (Research Square)” Hair cortisol may be a good indicator of recent mood in people with bipolar disorder.
February 2019 in “Psychoneuroendocrinology” Hair samples can reliably show average long-term hormone levels in young women.
Hair cortisol levels can effectively indicate long-term hormone activity.
78 citations
,
August 2014 in “Anais Brasileiros de Dermatologia” New vitiligo treatments focus on controlling immune damage and restoring skin color.
33 citations
,
January 2000 in “Acta Oto-Laryngologica” Epidermal growth factor increases extra hair cells in newborn rat ears.
27 citations
,
January 1995 Melanin in black hair protects it from sun damage better than light-brown hair.
18 citations
,
April 2010 in “Langmuir” Human hair surface varies in wettability, showing daily and monthly patterns.
13 citations
,
October 2002 in “Journal of Investigative Dermatology” The upper half of a human hair follicle can grow a new hair in a mouse, but success is rare.
13 citations
,
January 2001 in “Pediatric dermatology” A dark-haired Chinese girl had hair that looked banded under certain light but was normal under a microscope.
12 citations
,
February 1997 in “British Journal of Dermatology” The enzyme type 1 5α-reductase is more active in the hair follicle's lower part than in the skin's outer layer.
5 citations
,
January 1994 in “Skin Pharmacology and Physiology” DNA flow cytometry effectively evaluates how different conditions affect hair growth cell activity.
2 citations
,
September 2008 in “International Journal of Cosmetic Science” Brushing causes more long hair breaks than combing, especially with bleached or wet hair.
November 2025 in “Psychoneuroendocrinology” Hair proteomics could be a useful, non-invasive tool for identifying stress-related disorders.
March 2025 in “medRxiv (Cold Spring Harbor Laboratory)” Hair proteomics could be a promising non-invasive way to identify stress-related disorders.
August 2023 in “Research Square (Research Square)” Melanocytes may trigger the immune response in alopecia areata, affecting hair regrowth.
December 2022 in “Journal of Experimental Biology and Agricultural Sciences” Using certain plant growth regulators together improves the cloning of the medicinal plant Eclipta alba.
November 2021 in “International journal of research - granthaalayah” The document suggests that human hair has electrical charges because of a gap in nerve cell coverage that affects electromagnetic radiation.
June 2021 in “CRC Press eBooks” Plant-based hair care products can effectively treat hair loss with fewer side effects than synthetic treatments, and more research is needed for their development.
Prussian Blue causes hair cuticles to detach, weakening the hair.
October 2008 in “Experimental and Clinical Endocrinology & Diabetes” Long-term unemployment leads to higher stress levels.
December 2000 in “Kirk-Othmer Encyclopedia of Chemical Technology” Hair care products are regulated, with shampoos, conditioners, dyes, and styling products designed for cleaning, enhancing, and maintaining hair.
46 citations
,
April 2014 in “PLOS ONE” Gray hair may be caused by lower antioxidant activity in hair cells.
23 citations
,
October 2008 in “Experimental and Clinical Endocrinology & Diabetes” Hair can show increased cortisol levels during late pregnancy.
10 citations
,
September 2020 in “Metabolites” Hair color and length affect metabolite profiles in hair, so they should be considered in hair analysis.
2 citations
,
July 2009 in “Medical hypotheses” Identifying specific hair follicle parts could lead to better hair loss treatments.
1 citations
,
October 2020 Hair can reliably measure average estradiol levels over months in humans and monkeys.
December 2023 in “The journal of physical chemistry. B (1997 : Online)” Human hair keratin might be good for filtering out harmful substances from water.
158 citations
,
January 2003 in “Journal of Forensic Sciences” Hair testing can detect a single GHB exposure, useful for documenting sexual assault.
138 citations
,
June 2004 in “Journal of Investigative Dermatology” Involucrin gene expression is controlled by specific proteins and signaling pathways.
133 citations
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June 1993 in “Molecular and Cellular Biology” The human K5 promoter controls specific gene expression in skin cells, with key regulatory elements near the TATA box.