14 citations
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September 2016 in “Journal of Photochemistry and Photobiology B Biology” UV exposure damages hair, increasing thiols and altering protein structure.
49 citations
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April 2007 in “Pediatric Dermatology” Biotin improved hair appearance in uncombable hair syndrome but didn't change hair structure.
September 2023 in “Biomedicines” Squalene may be a marker for certain types of alopecia.
20 citations
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August 1960 in “PubMed” Selenium sulfide may affect hair root health.
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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.
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March 1997 in “International Journal of Dermatology” Selenium sulfide in anti-dandruff shampoos can turn hair green.
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August 2018 in “Plant physiology” Hydrogen sulfide disrupts protein function and root hair growth in plants by modifying proteins.
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September 1986 in “Pediatric dermatology” Zinc therapy improved hair health in a girl with acrodermatitis enteropathica.
January 2024 in “International Journal of Cosmetic Science” A new method using 1,4-n-butylene dimaleate effectively repairs and strengthens damaged hair.
March 2010 in “International Journal of Cosmetic Science” Disulfide bonds affect the melting behavior of hair's crystalline structure, but hair retains some stability even after these bonds are broken.
September 2024 in “Journal of the American Academy of Dermatology” Selenium disulfide shampoo effectively reduces dandruff and is well-liked by users.
May 2024 in “International Journal of Cosmetic Science” Disulfide bonds are crucial for hair's strength, especially when wet.
19 citations
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October 1989 in “PubMed” Minoxidil helps hair growth by being sulfated in hair follicles.
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January 2016 in “Annals of dermatology/Annals of Dermatology” Iron supplements can restore normal hair color in cases of premature graying linked to iron deficiency.
January 1996 in “Journal of Investigative Dermatology”
A 5-year-old girl has sparse, dry, and brittle hair but is otherwise healthy.
29 citations
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August 2005 in “Biopolymers” L-cysteine slows down the breaking of bonds in hair due to electrostatic interactions.
1 citations
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December 2013 in “Balkan Journal of Medical Genetics” Cystic fibrosis can cause unusual symptoms like hair color changes, which can improve with proper treatment.
September 1980 in “PubMed” Using selenium disulfide on guinea pigs increased hair loss.
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April 2014 in “Dermatologic Therapy” Sulfotransferase in hair follicles helps predict how well minoxidil works for female hair loss.
39 citations
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June 2012 in “Journal of Structural Biology” Disulfide bonds are crucial for hair structure during keratinization.
September 2014 in “Journal of the American Academy of Dermatology” The girl likely has Loose anagen hair syndrome, which may improve on its own or with minoxidil.
February 1988 in “Journal of the American Academy of Dermatology”
May 2022 in “Experimental dermatology” Trichothiodystrophy hair is structurally abnormal with protein and organization issues.
December 2025 in “Microbes and Infectious Diseases /Microbes and Infectious Diseases” Fungi and iron deficiency are linked to hair loss in alopecia patients.
September 2016 in “Journal of Engineering and Technological Science” Women with telogen effluvium have an imbalance in thiol-disulphide, suggesting oxidative stress may contribute to hair loss.
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July 2017 in “Skin appendage disorders” A 9-year-old Hispanic girl has Uncombable Hair Syndrome, which may improve with age and biotin treatment.
4 citations
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December 2019 in “Dermatologic Therapy” Hair enzyme activity predicts minoxidil success in Brazilian women with hair loss.
98 citations
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October 2012 in “Dermatologic Clinics” Eating the right nutrients can improve hair health, but taking extra supplements usually doesn't help unless you have a deficiency.
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January 1981 Nucleophilic reagents break down hair keratin, forming more lanthionine and lysinoalanine than in wool.