August 2025 in “Chronobiology International” Irregular sleep and disrupted body clocks can lead to more hair loss in young adults.
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.
220 citations
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August 1988 in “Clinical endocrinology” Melatonin may help with sleep issues, depression, and cancer, but more research is needed.
47 citations
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May 1999 in “Reproduction” Goat reproductive activity and coat growth are affected by light and temperature, with temperature altering prolactin levels and hair growth, but not melatonin or estrus onset.
38 citations
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June 2017 in “The Journal of Dermatology” Aging in hair follicle stem cells leads to hair graying, thinning, and loss.