10 citations
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August 2014 in “Skin research and technology” Sleep, testosterone levels, and a specific enzyme activity affect skin oil production in women.
August 2025 in “Chronobiology International” Irregular sleep and disrupted body clocks can lead to more hair loss in young adults.
5 citations
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August 2018 in “International Journal of Dermatology” Men with sleep apnea and low iron levels are more likely to have male-pattern baldness, especially if they have a family history of hair loss.
83 citations
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May 2011 in “Experimental Dermatology” Sheep have 17 keratin genes, similar to humans, but with different expression patterns affecting wool and hair.
17 citations
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October 2017 in “Scientific reports” Fine wool sheep have more genes for wool quality, while coarse wool sheep have more for skin and muscle traits.