March 2025 in “Institutional Repositories DataBase (IRDB)” The testes significantly contribute to vitamin D metabolism and may affect male reproductive health and conditions like hair loss.
January 2019 in “Central European Journal of Urology”
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March 2014 in “British Journal of Dermatology” Hair loss in male pattern baldness involves muscle degeneration and increased scalp fat.
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January 2016 in “International Journal of Andrology” Bald men may have a lower risk of testicular cancer.
April 2024 in “Journal of cutaneous pathology” Skin conditions like seborrheic dermatitis can make it harder to correctly diagnose hair loss because they can cause the oil glands in the skin to shrink.
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July 1992 in “Clinics in Dermatology” Scalp reduction surgery can effectively treat male pattern baldness when tailored to the patient and performed with care to minimize complications.
December 2025 in “Russian Journal of Skin and Venereal Diseases” Thinner hair follicle structures are linked to non-scar alopecia.
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October 2024 in “JCEM Case Reports” 5α-reductase deficiency can cause ambiguous genitalia and gender dysphoria, treatable with testosterone.
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October 2024 in “BMJ Case Reports” Fertility-preserving surgery can help women with early-stage Sertoli-Leydig cell tumors conceive naturally.
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April 1989 in “The American Journal of the Medical Sciences” Glucocorticoids can cause long-term loss of body hair by lowering adrenal androgens.
July 2025 in “Journal of Investigative Dermatology” Androgens reduce THY1 in skin cells, leading to less fat, more fibrosis, and worse healing in males.
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April 2024 in “bioRxiv (Cold Spring Harbor Laboratory)” Aging skin shows thinner layers, fewer hair follicles, and new biomarkers like increased space between cells and smaller sebaceous glands.
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April 2012 in “Fertility and Sterility” Finasteride causes lasting fertility decrease in rats.
March 2022 in “Osaka City University (Osaka City University)” Ovariectomy in mice affects hair growth and skin thickness, suggesting potential for obesity treatment research.
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September 2024 in “Stem Cell Research & Therapy” Sertoli cell transplants can reduce inflammation and improve sperm quality.
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December 2009 in “Developmental Neurobiology” Androgens are essential for maintaining adult neuromuscular structure.
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December 2019 in “Frontiers in endocrinology” Higher androgen levels during puberty are linked to shorter adult height in boys with Silver-Russell syndrome.
December 2025 in “Reports of Morphology” Men with alopecia areata have different body fat distribution compared to healthy men.
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May 1996 in “American journal of physiology. Regulatory, integrative and comparative physiology/American journal of physiology. Regulatory, integrative, and comparative physiology” Gray seals use more energy and have higher hormone levels during their annual fur-shedding period.
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August 2013 in “PubMed” Testosterone changes reduce thyroxin levels in rats.
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April 2009 in “Andrologia” A boy's early puberty caused by a testicular tumor returned to normal after surgery.
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May 1998 in “Skin Research and Technology” Scalp flaps are stiffer than skin from other body areas, which helps in planning reconstructive and cosmetic head surgeries.
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February 2025 in “Journal of Anatomy” Gray short-tailed opossums' skin shifts from helping with breathing to regulating body temperature as they grow.
January 2026 in “Frontiers in biomedical technologies” DHT causes thicker and less elastic skin, linked to hair loss.
As people age, certain enzymes in scalp glands decrease, affecting hair health.
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July 1987 in “Dermatologic Clinics” Scalp reduction can treat severe hair loss, but success depends on scalp flexibility and it may cause complications like pain, infection, and cosmetic issues.
August 2012 in “Open Repository and Bibliography (University of Liège)” A castrated dog developed hair loss and prostate issues from long-term exposure to estrogen cream.
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April 2002 in “PubMed” Mini rats have thinner skin, more fat, and different hair cycles than Wistar rats due to lower growth hormone levels.
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July 1990 in “Teratology” Finasteride exposure in pregnancy causes genital abnormalities in male rats.