19 citations
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March 1961 in “Nature” A fatty acid/protein complex in human hair helps protect it from damage.
18 citations
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March 2009 in “Skin pharmacology and physiology” Sunlight damages hair, causing cuticle loss, protein changes, and discoloration.
17 citations
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September 2005 in “International Journal of Dermatology” African hair is more fragile due to its unique shape and internal structure.
15 citations
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October 1936 in “Archives of Dermatology” Cystine is crucial for forming keratin in hair, wool, and nails.
15 citations
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January 2016 in “Przeglad Menopauzalny” Eating a balanced diet with specific nutrients is important for menopausal women to manage hair loss.
15 citations
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January 1988 Hair follicles have unique proteins that vary by species and are influenced by nutrition.
13 citations
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October 1960 in “Experimental Biology and Medicine” Selenium-75 stays in dog hair for up to 316 days.
10 citations
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January 1994 Hair can be straightened using different chemicals, not just strong alkali.
10 citations
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May 1974 in “American journal of diseases of children” The girl had a rare disorder causing mental and physical symptoms, with weak hair and unclear neurological issues.
9 citations
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October 1946 in “Experimental biology and medicine” Rats fed soybean oil meal lost hair, but adding inositol, biotin, cystine, or methionine to their diet prevented this and improved growth.
7 citations
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March 2004 in “Journal of the American Academy of Dermatology” Tiger tail banding and hair abnormalities are reliable indicators for diagnosing trichothiodystrophy.
6 citations
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September 2010 in “Pigment Cell & Melanoma Research” We know less about human hair pigmentation than mouse coat color, but pH and cysteine levels are key factors.
5 citations
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January 1964 in “Naunyn-Schmiedeberg s Archives of Pharmacology” Iodine is absorbed by hair just below the skin surface.
4 citations
,
May 2020 in “Annals of palliative medicine” Plum blossom needle acupuncture with qi-invigorating therapy is more effective for Seborrheic Alopecia than Western medicine.
4 citations
,
January 1976 in “Archives of Dermatological Research” Metabolic disorders can cause hair structure defects and growth issues, but amino acid levels in hair remain normal.
3 citations
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June 2011 in “Journal of acupuncture and tuina science/Journal of Acupuncture and Tuina Science” Acupuncture is more effective than medication for treating alopecia areata.
October 2021 in “Digital Library of Theses and Dissertations (Universidade de São Paulo)” The active ingredient improves the strength of damaged hair fibers.
January 2011 in “Yearbook of Dermatology and Dermatologic Surgery” Hair relaxers are linked to reduced cystine levels and potential hair damage.
January 2011 in “대한피부과학회지” A 7-year-old girl was diagnosed with trichothiodystrophy due to low sulfur levels in her hair.
January 2007 in “Revista del Centro Dermatológico Pascua” A 2-year-old boy was diagnosed with a rare genetic condition causing fragile hair, intellectual issues, and short stature.
Chemical treatments weaken hair's thermal stability and structure.
January 1991 in “Journal of Society of Cosmetic Chemists of Japan” Hair treatments can damage hair by changing its chemical content.
January 2014 in “한국미용학회지” UV-A radiation significantly damages semi-permanent dyed hair.
May 2010 in “International Journal of Cosmetic Science” Mercaptans make hair more prone to damage, with reduced hair being more affected than permed hair.
January 2014 in “Chinese Journal of Aesthetic Medicine” ChuZhiShengFaPian and Licorzine Granules effectively treat early male hair loss.
226 citations
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January 2006 in “International review of cytology” Keratin-associated proteins are crucial for hair strength and structure.
73 citations
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June 2006 in “Animal genetics” The FGF5 gene determines hair length in dogs.
62 citations
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January 2004 in “The journal of investigative dermatology/Journal of investigative dermatology” A second domain of high sulfur KAP genes on chromosome 21q23 is crucial for hair structure.
36 citations
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October 2014 in “Langmuir” Bleaching hair removes its protective top layer and exposes more hydrophilic groups, changing its chemical surface and affecting how it interacts with products.
34 citations
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September 2007 in “Experimental Dermatology” The outer layer of Merino wool is rich in sulfur proteins, making it resistant to damage.