62 citations
,
December 1966 in “Endocrinology” Injecting α-MSH made mice's hair turn black.
11 citations
,
August 1986 in “Archives of Dermatology” Vitamin B12 deficiency can cause skin and hair color changes, which can be reversed with treatment.
2 citations
,
March 1997 in “Veterinary Dermatology” The Doberman had multiple skin tumors, but it's unclear if color dilution increased the risk.
13 citations
,
December 1940 in “The journal of nutrition/The Journal of nutrition” Lack of certain vitamins causes fur loss and greying in silver foxes.
10 citations
,
June 2009 in “Acta Biochimica Polonica” Old C57BL/6 mice with unsynchronized hair cycles show less melanin in their spleens.
January 2026 in “Phaidra - Repository of the University of Veterinary Medicine, Vienna” Hair cortisol levels in wolves reflect stress and vary by season and body region.
November 2020 in “Journal of animal science/Journal of animal science ... and ASAS reference compendium” Certain genetic variants in PRLR and PCCA genes may lead to shorter hair in cattle, which could help with heat tolerance.
January 2022 in “SSRN Electronic Journal” Mouse hair follicles age, causing more white hairs due to fewer pigment stem cells.
The gene Endothelin 3 makes mice's fur darker by increasing pigment cells and pigment levels.
18 citations
,
April 1989 in “Archives of Dermatology” Iron deficiency can cause hair color changes, which can be reversed with iron supplements.
March 2013 in “Pigment Cell & Melanoma Research” A gene called Taqpep affects cat coat patterns like stripes and blotches.
May 2019 in “Small Animal Dermatology” The dog has Color Dilution Alopecia, causing hair loss and increased risk of skin infections.
7 citations
,
May 2021 in “Animal Genetics” The CORIN gene variant causes the golden color in Siberian cats.
35 citations
,
November 2021 in “Journal of Animal Science and Biotechnology/Journal of animal science and biotechnology” DNA methylation changes in Tan sheep affect growth and fur traits.
January 2016 in “Xumu Shouyi Xuebao” 2 citations
,
July 2016 in “Veterinary dermatology” Hyperaesthetic leucotrichia in horses causes painful, recurring skin lesions and hair color changes, especially in Arabian and American paint horses.
January 1957 in “Nihon Chikusan Gakkaiho” Rabbit hair color is influenced by the shape and distribution of pigment granules.
40 citations
,
January 2016 in “PLoS ONE” Shorter daylight increases hair growth in Cashmere goats.
36 citations
,
November 2016 in “European journal of dermatology/EJD. European journal of dermatology” Some medications can cause rare hair color changes, and reporting these side effects is important for patient quality of life.
77 citations
,
August 1986 in “Archives of Dermatology” Vitamin B12 deficiency can cause skin and hair color changes, which are reversible with treatment.
June 2021 in “Clinical neuropsychopharmacology and therapeutics” Valproic acid can cause hair color change in older men.
1 citations
,
July 1935 in “Nature” Animal hair can curl tightly on its own, especially in foxes, due to changes in keratin.
Dark hair with a red beard likely evolved for camouflage, not attraction.
4 citations
,
February 2025 in “BMC Genomics” Black wool in Qira sheep is linked to specific gene mutations, especially in the TYRP1 gene.
March 2025 in “Animal Bioscience” Goats' hair and color traits are linked to specific RNA expressions, useful for breeding and textiles.
140 citations
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August 2010 in “Pigment Cell & Melanoma Research” We know a lot about mouse hair color, but not much about human hair color differences.
161 citations
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June 1994 in “The journal of investigative dermatology/Journal of investigative dermatology” Hair stops producing melanin as it transitions from the growth phase to the resting phase.
January 2005 in “Chinese Journal of Veterinary” Hairless mice lose hair by 3-4 weeks, develop thicker, folded skin, and show pigmentation differences.
4 citations
,
August 2023 in “Nature Communications” Mouse zigzag hair bends form due to a 3-day cycle of changes in hair progenitors and their environment.
2 citations
,
April 2025 in “Small Ruminant Research” South African sheep breeds have diverse genes affecting traits like coat color, horn development, and wool quality.