8 citations
,
February 2005 in “British Journal of Haematology” Chemotherapy caused the patient's hair to have alternating thick and thin segments.
3 citations
,
August 2017 in “Clinical case reports” A rare skin condition causes red and dark patches on the face and limbs.
166 citations
,
July 1999 in “American Journal Of Pathology” The hairless (hr) gene is essential for normal hair follicle function and its mutation leads to hair loss.
December 1988 in “Anatomia, Histologia, Embryologia” Frequent hair dye use caused significant hair and skin damage and affected the dogs' behavior.
62 citations
,
December 1966 in “Endocrinology” Injecting α-MSH made mice's hair turn black.
14 citations
,
September 1968 in “Archives of Dermatology” Using hot combs can cause permanent hair loss on the scalp's crown.
15 citations
,
January 1989 in “European Journal of Cancer and Clinical Oncology” April 2023 in “Journal of Investigative Dermatology” Increased TEMRA cells can predict treatment outcomes in rapidly progressive alopecia areata.
11 citations
,
July 2010 in “European Journal of Dermatology” The condition is linked to chromosome 12, but no mutations were found in the known genes.
January 2026 in “Deutsches Ärzteblatt international” February 2026 in “Frontiers in Medicine” Men and women in Shanghai have different scalp aging and visual attention patterns.
37 citations
,
August 2020 in “BMC Genomics” Hair greying is mainly influenced by age, with genetics playing a smaller role.
66 citations
,
February 1985 in “Archives of dermatological research” Hair dyes penetrate the scalp very minimally, less than 1%.
34 citations
,
March 2007 in “Biochemical and Biophysical Research Communications” Thioredoxin reductase 1 does not affect glucocorticoid receptor activity in hair follicle cells.
16 citations
,
August 2000 in “Il Farmaco” Men have more tryptophan in their hair than women, and it increases with age and is higher in darker and grey or white hair.
February 2018 in “bioRxiv (Cold Spring Harbor Laboratory)” Rodent spiny hair traits are due to genetic factors other than the Edar gene.
2 citations
,
January 2015 6 citations
,
December 1989 in “Journal of the American Academy of Dermatology” Minoxidil lotion can cause hair discoloration.
76 citations
,
January 1998 in “Mammalian Genome”
October 2021 in “QJM: An International Journal of Medicine” Low iron levels are linked to premature graying of hair, but vitamin D levels are not.
January 2015 in “Journal of pediatric endocrinology & metabolism/Journal of pediatric endocrinology and metabolism” A 5-year-old girl with McCune-Albright syndrome grew abnormal hair due to the drug tamoxifen.
264 citations
,
October 1958 in “Archives of Dermatology” A 4-year-old girl has a rare hair condition causing fragile, short hair.
8 citations
,
August 2013 in “Pediatric Dermatology” Loose Anagen Hair Syndrome is found in black-haired Indian children and is often missed, especially in boys.
4 citations
,
January 2018 in “Urology & Nephrology Open Access Journal” Hair dye chemicals can cause serious health problems, including kidney damage.
Premature hair graying is common and linked to stress, obesity, vitamin deficiencies, family history, lack of exercise, smoking, and allergies.
January 2014 in “Journal of Pigmentary Disorders” Women's hair gets thinner and grayer as they age, with treatments available for hair loss and graying.
August 2023 in “Faculty Opinions – Post-Publication Peer Review of the Biomedical Literature” Minoxidil users may experience hair discoloration, especially with long-term use and a family history of gray hair.
27 citations
,
May 2011 in “Journal of Investigative Dermatology” TCHHL1 is a protein important for hair growth, found in hair follicles.
15 citations
,
December 2014 in “PLoS ONE” A mutation in the iRhom2 gene causes hairless mice due to abnormal hair follicle development.