Early baldness and little chest hair may indicate higher prostate cancer risk.
October 2017 in “The Japanese Biochemical Society/The Molecular Biology Society of Japan” Some natural compounds might help hair grow.
118 citations
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January 1992 in “Experientia”
7 citations
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June 2020 in “Experimental dermatology” Researchers found that certain lipids, especially vitamin D3, are lower in prematurely grey hair than in pigmented hair.
1 citations
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January 2007 in “中国科学通报:英文版” Women's hair has more sulfur, and black hair has more calcium than white hair.
1 citations
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March 1991 in “PubMed” Naevoid bundle hair is an unusual hair growth pattern where multiple hairs fuse together.
December 2022 in “Scientific Reports” Stem cells from whiskers can be transplanted to stimulate hair growth.
September 2024 in “Journal of Investigative Dermatology” A new tool can analyze hair to detect changes due to hormones, genetics, and aging.
1 citations
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February 2009 in “Journal of Investigative Dermatology” Lipase H is important for hair follicle function and shaping hair fibers.
January 2012 in “The Journal of Practical Medicine” Chinese Han individuals have fewer hair follicles and hairs than Caucasians and Africans.
96 citations
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February 2002 in “Journal of the American Academy of Dermatology” Pseudofolliculitis barbae is a chronic skin condition affecting mainly African American and Hispanic individuals, caused by shaving tightly curled hair, and managed by prevention and treatment but not curable.
January 2003 in “Elsevier eBooks” Androgens and other hormones affect hair growth and skin conditions like acne.
10 citations
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August 2013 in “Experimental Dermatology” Hairless protein and putrescine regulate each other, affecting hair growth and skin balance.
1 citations
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August 2015 in “PubMed” Human hair's strength comes from a honeycomb-like structure and macrofibrils.
21 citations
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November 2015 in “Phytomedicine” Glycyrrhizic acid may help reduce unwanted hair growth.
December 2017 in “JURNAL FARMANESIA” Red dragon fruit peel extract can effectively dye gray hair black.
5 citations
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March 2001 in “Journal of biomechanics” Growing hairs are easier to pull out than resting hairs due to different anchorage strengths.
17 citations
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May 1969 in “American Journal of Physical Anthropology” The silver marmoset's skin is thin, lacks pigment cells, and has unique features like keratinized spines and specialized glands.
1 citations
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September 2024 in “Veterinary Dermatology” Trichography is important for diagnosing hair fragility in Pomeranian dogs with hair cycle issues.
December 2014 in “Bali Medical Journal” Females have higher estrogen receptor levels in hair than males, and these levels decrease in white hair compared to black hair.
20 citations
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October 1996 in “Journal of the American Academy of Dermatology” 46 citations
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January 1991 in “Tissue and Cell” The male silkmoth's antenna develops olfactory structures over 21 days, with full hair formation by day 15.
September 2019 in “Journal of Investigative Dermatology” People with pattern hair loss have higher polyamine levels in the top of their head compared to the back.
2 citations
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January 1990 32 citations
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September 1966 in “Journal of Investigative Dermatology” January 2005 in “Journal of Zhejiang University(Sciences Edition)” Yuyi hairless mice lose hair after birth, develop thick, loose skin with folds, and show disorganized skin structure as they age.
8 citations
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May 2008 in “Applied surface science” Mummy hair from the Taklamakan desert has calcium and phosphorus inside.
1 citations
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April 2025 in “BMC Veterinary Research” PSAT1 is key for hair growth and stem cell function in cashmere goats.
May 2026 in “Research Square” The polyG fragment in Hoxc13 protein helps evolve mammalian skin and hair by enhancing gene interactions.