Cows moving from tie-stall to free-stall housing had more heel problems, less joint lesions, and higher stress levels.
47 citations
,
January 2016 in “MethodsX” Hair cortisol analysis is a reliable tool for monitoring long-term stress in captive chimpanzees if certain variables are controlled.
296 citations
,
October 2018 in “General and Comparative Endocrinology” Hair cortisol is a reliable way to measure long-term stress in animals.
January 2026 in “Western Journal of Nursing Research” Hair cortisol levels don't reliably indicate chronic stress in people with multiple sclerosis.
12 citations
,
December 2020 in “Comprehensive psychoneuroendocrinology” Hormone levels in hair change during pregnancy, with progesterone increasing significantly compared to non-pregnant women.
231 citations
,
October 1999 in “Journal of Clinical Investigation” Activating the Sonic hedgehog gene in mice can start the hair growth phase.
149 citations
,
June 2010 in “The FASEB journal” miR-31 regulates hair growth by controlling gene expression in hair follicles.
90 citations
,
July 2014 in “Conservation Physiology” Hair cortisol levels in brown bears can be affected by both long-term and short-term stress.
77 citations
,
March 2000 in “Journal of Investigative Dermatology” The research identified six functional hair keratin genes and four pseudogenes, providing insights into hair formation and gene organization.
71 citations
,
January 2012 in “PloS one” The conclusion is that genetic differences affect how the cochlea heals after hair cell loss, which may challenge the creation of hearing loss treatments.
64 citations
,
January 2009 in “The International journal of developmental biology” Hair follicle stem cells are controlled by their surrounding environment.
47 citations
,
September 2004 in “Journal of Biological Chemistry” Hoxc13 regulates specific hair protein genes on mouse chromosome 16.
7 citations
,
March 2014 in “ISRN Biomaterials” Keratin hydrogel from human hair helps rats recover better from spinal cord injuries.
June 2025 in “Molecular Therapy — Nucleic Acids” A new treatment using a DNA aptamer can promote hair growth by targeting a specific receptor.
February 2025 in “Animals” Understanding proteins in skin structures like claws and hair is crucial for future research.
10 citations
,
September 2019 in “Frontiers in Veterinary Science” Older steers have higher hair cortisol levels than younger steers.
20 citations
,
February 2023 in “Biology” Innovative cosmetics could safely change hair color by targeting biological hair pigmentation processes.
338 citations
,
July 2009 in “Development” Sox2-positive cells determine specific hair follicle types in mammals.
98 citations
,
April 2003 in “Die Naturwissenschaften” 90 citations
,
December 2008 in “Journal of Investigative Dermatology” Thyroid-stimulating hormone affects hair follicles but doesn't change hair growth or color.
38 citations
,
December 2006 in “Journal of Investigative Dermatology” Keratin patterns in hair follicles help understand hair growth and potential hair and nail disorders.
31 citations
,
August 2021 in “Stem Cell Research & Therapy” The conclusion is that understanding how hair follicle stem cells live or die is important for maintaining healthy tissue and repairing injuries, and could help treat hair loss, but there are still challenges to overcome.
29 citations
,
January 2021 in “Journal of Investigative Dermatology” Fat under the skin releases HGF which helps hair grow and gain color.
12 citations
,
January 2015 in “Skin appendage disorders” Dermoscopy helps quickly identify hair breakage in people of African descent.
11 citations
,
November 1998 in “Journal of dermatological science” Knocking out certain genes in mice helps understand skin and hair growth problems.
8 citations
,
December 2022 in “BMC Genomics” The research improved understanding of yak hair growth to help use yak wool better.
October 2025 in “International Journal of Cosmetic Science” Hair properties vary by ethnicity and environment, affecting surface charge and particle deposition.
7 citations
,
March 2022 in “Frontiers in Genetics” The research found specific genes that may cause longer hair in Tianzhu White Yak.
38 citations
,
February 2009 in “Journal of The European Academy of Dermatology and Venereology” Severe vertex pattern hair loss may indicate a higher risk for artery plaque buildup.
23 citations
,
December 2004 in “Differentiation” Sex hormones affect hair and feather growth and may help manage alopecia and hormone-dependent cancers.