6 citations
,
January 2017 in “Journal of toxicologic pathology” Rabbit skin with active hair growth shows thicker, redder areas due to larger, more numerous hair follicles and increased blood vessels.
14 citations
,
September 2017 in “Hereditas” Genes influence horse coat color and may help understand human skin conditions.
53 citations
,
November 1997 in “Journal of Forensic Sciences” Darker hair in guinea pigs holds more codeine than lighter hair.
3 citations
,
April 2023 in “Veterinary sciences” Researchers found genes that may explain why some pigs grow winter hair, which could help breed cold-resistant pigs.
10 citations
,
August 2023 in “Animals” SLC45A2 and GPNMB genes help control chicken feather color by promoting melanin.
July 2025 in “Dermatology Practical & Conceptual” Topical eyedrops may cause eyelash whitening and skin lightening around the eyes.
12 citations
,
November 1945 in “Archives of dermatology” Transplanted skin on hooded rats often grows white hair instead of black.
17 citations
,
May 1969 in “American Journal of Physical Anthropology” The silver marmoset's skin is thin, lacks pigment cells, and has unique features like keratinized spines and specialized glands.
January 2024 in “Dermatology practical & conceptual” The Peripilar sign does not indicate perifollicular infiltrate in hair loss from Androgenetic Alopecia.
2 citations
,
March 2017 in “Sultan Qaboos University medical journal” An infant had two different natural hair colors on the scalp with no health issues.
1 citations
,
May 2011 in “DOAJ (DOAJ: Directory of Open Access Journals)” The study found genetic diversity in coat color dilution among Czech pointers in Slovakia.
4 citations
,
March 2024 in “Journal of Investigative Dermatology” SPRY1 deficiency in skin cells causes stem cells to move to the skin surface, leading to increased pigmentation.
1 citations
,
May 2012 in “Clinical and Experimental Dermatology” Iron can be present in hair color changes without overall iron deficiency.
44 citations
,
April 1979 in “Journal of Ultrastructure Research”
18 citations
,
January 2020 in “Ecology and evolution” Genes related to pigmentation, body rhythms, and behavior change during hares' seasonal coat color transition, with a common genetic mechanism in two hare species.
75 citations
,
January 2009 in “International journal of trichology” Hair grays due to oxidative stress and fewer functioning melanocytes.
60 citations
,
January 2004 in “The journal of investigative dermatology/Journal of investigative dermatology” Applying a specific inhibitor lightens skin and hair color.
November 2022 in “Indian Journal of Dermatology/Indian journal of dermatology” Valproic acid can cause dark lines on nails.
2 citations
,
March 1977 in “Journal of animal science/Journal of animal science ... and ASAS reference compendium” Defective mink guard hairs have split tips and missing cuticle cells, causing a metallic sheen.
62 citations
,
December 1941 in “Experimental biology and medicine” Eating phenylthiocarbamide made all the rats' hair go gray, but some returned to their original color after stopping.
December 2023 in “Clinical, cosmetic and investigational dermatology” The study found that white hair in vitiligo has specific patterns and structures, which vary with the stage of the disease and may be similar to another hair condition.
8 citations
,
May 2012 in “Clinical and Experimental Dermatology” An 82-year-old woman's hair turned white suddenly, likely due to a rare form of alopecia that targets pigmented hair.
August 2025 in “Annals of Medicine” Mycophenolate mofetil may safely help restore skin color in depigmentation conditions.
September 2023 in “Curēus” A 21-year-old male has a benign skin condition called Becker's nevus, which he chose not to treat.
20 citations
,
November 2004 in “Archives of Pathology & Laboratory Medicine” A rare benign skin growth called melanocytic matricoma was identified in a 69-year-old man.
29 citations
,
January 2013 in “The journal of investigative dermatology/Journal of investigative dermatology” P-cadherin is crucial for hair follicle pigmentation but not skin pigmentation.
1 citations
,
November 2023 in “Cureus” Early diagnosis of Bloch-Sulzberger Syndrome is crucial to prevent severe complications.
April 2016 in “The journal of investigative dermatology/Journal of investigative dermatology” MPZL3 is crucial for seborrheic dermatitis development.
4 citations
,
November 2019 in “Dermatology - Open Journal” Lichen planus pigmentosus is hard to treat and may be more common in North Africa than previously thought.
A 32-year-old man with early graying hair shows a unique pattern, suggesting more research is needed on why hair grays early.