November 2024 in “Journal of Microscopy” Human hair varies in structure based on curl type, with high curl hair showing the most differences.
January 2023 in “Figshare” Mouse skin and hair aging starts at 200 days, with changes in hair follicles and more white hairs as signs of aging.
25 citations
,
August 2017 in “Frontiers in Zoology” Marine mammals lost many α-keratin genes, aiding their adaptation to aquatic life by becoming hairless.
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.
Iron supplements may reverse premature graying in iron-deficient individuals; ingrown nails are common in diabetics with certain risk factors; topical finasteride may reduce scalp DHT as effectively as oral finasteride; monilethrix treatment is challenging but some medications can help.
6 citations
,
October 2013 in “Yichuan” miRNAs are key in skin and hair growth and maintenance.
January 2023 in “Indian Dermatology Online Journal” A 23-year-old man has a benign, non-progressive hair loss patch that doesn't respond to treatment but can be cosmetically treated.
109 citations
,
October 2007 in “Journal of pineal research” Melatonin helps regulate hair growth and protects the hair follicle from stress.
30 citations
,
July 2000 in “PubMed” Hair has unevenly distributed proteins and lipids, with lipids mainly in the cuticle and proteins in the cortex and medulla.
149 citations
,
June 2010 in “The FASEB journal” miR-31 regulates hair growth by controlling gene expression in hair follicles.
9 citations
,
January 2005 in “Experimental dermatology” Melatonin receptors in hair follicles help regulate hair growth and could treat hair loss.
January 2024 in “Revista Dermatológica Centro Uraga” Frontal fibrosing alopecia is increasingly affecting men, causing hair loss around the hairline and possibly other areas.
2 citations
,
September 2002 in “Dermatologic Surgery” Each group of hair follicles on the scalp shares one muscle that helps control hair movement.
42 citations
,
February 1996 in “Journal of Investigative Dermatology” Polyamines, especially spermidine, are essential for hair growth.
5 citations
,
September 2020 in “Journal of The American Academy of Dermatology” Men can experience female pattern hair loss, needing different treatments.
February 2026 in “Journal of the American Academy of Dermatology”
6 citations
,
May 2012 in “Clinical and experimental dermatology” Oral minoxidil can cause inflamed, ingrown hairs in the beard area.
19 citations
,
August 2013 in “Facial Plastic Surgery Clinics of North America” Children's hairlines change shape as they grow, with women often developing a widow's peak and men's hairlines becoming more convex and possibly balding at the temples, influenced by genetics and hormones.
46 citations
,
August 1977 in “Journal of Morphology” The big-clawed shrew's sinus hair follicles are highly specialized for sensing vibrations.
November 2014 in “British Journal of Dermatology” Male hair loss is mainly due to thinner hair, not less hair.
4 citations
,
January 1992 in “The Tohoku Journal of Experimental Medicine” Zinc made mice's coarse hair turn into fine hair without affecting skin structure.
15 citations
,
January 2011 in “International journal of trichology” Using a hot iron on wet hair can cause dry, brittle hair with air bubbles inside.
A 14-year-old girl with Loose Anagen Hair Syndrome was successfully treated with oral Minoxidil and a Silicon supplement.
25 citations
,
September 2006 in “Birth Defects Research” Different processes create patterns in skin and things like hair and feathers.
1 citations
,
March 2017 in “Roczniki Naukowe Polskiego Towarzystwa Zootechnicznego” Domestic cat hair varies in thickness and length, with guard hairs being longest and thickest, and all hair types mainly contain keratin.
81 citations
,
September 2009 in “Birth defects research” Different body areas in mice produce different hair types due to interactions between skin layers.
15 citations
,
January 1954 in “Endocrinology” Iodine in rat hair is linked to hair growth.
April 2018 in “Journal of Investigative Dermatology” Arrector pili muscle regulates hair follicle stem cells, DNA methylation needed for hair cycling, and Wnt/B-catenin signaling starts hair growth.
1 citations
,
January 1993 in “Skin Pharmacology and Physiology” Hair growth drugs and epidermal growth factor do not change the calcium binding site gradient in hair follicles.
61 citations
,
October 1996 in “Development” Hair growth can be stimulated by combining certain skin cells, which can rejuvenate old cells and cause them to specialize in hair follicle creation.