January 2024 in “JAAD case reports” MSUD patients need careful monitoring of amino acids and zinc to prevent severe symptoms.
46 citations
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November 1963 in “Journal of Histochemistry & Cytochemistry” Arginine converts to citrulline in hair follicles as proteins harden.
1 citations
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July 2022 in “Clinical and Experimental Dermatology” Amino acid supplements may not be necessary for all women with chronic hair loss.
April 2024 in “Current research in nutrition and food science” Taking an amino acid supplement improved skin, hair, and nail health in women.
7 citations
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January 1959 in “Canadian Journal of Chemistry” Human and horse hair have similar end groups to wool and feathers.
125 citations
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February 1971 in “Biochemistry” Specific cross-linkages help make hair proteins stable and strong.
15 citations
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January 1988 Hair follicles have unique proteins that vary by species and are influenced by nutrition.
9 citations
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June 1947 in “Analytical Chemistry” Cold waving solutions quickly reduce cystine to cysteine in hair.
January 2018 in “ScholarWorks @UVM (University of Vermont)” Selenium in proteins helps prevent over-oxidation and supports chemical reversibility.
108 citations
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April 2004 in “Medicinal Research Reviews” Steroid sulfatase inhibitors could help treat hormone-related disorders and cancers.
August 2023 in “Dermatology reports” A baby with maple syrup urine disease improved from skin problems by adjusting his diet to correct amino acid levels.
39 citations
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June 2012 in “Journal of Structural Biology” Disulfide bonds are crucial for hair structure during keratinization.
August 2023 in “Fermentation” Scientists can use engineered microbes to make L-aspartate and related chemicals, but there's still room to improve their efficiency.
May 2010 in “Europe PMC (PubMed Central)” Near-infrared probes can safely and effectively image cysteine protease activity for disease diagnosis.
22 citations
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January 2008 in “Physiological Research” Steroid sulfatase is important for activating hormones that affect memory, brain function, and certain diseases, and could be a target for treating hormone-related disorders.
18 citations
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October 2022 in “JCI Insight” Abnormal amino acid metabolism may worsen rosacea symptoms.
18 citations
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January 2008 in “Sen'i Gakkaishi” Thioglycolic acid and L-cysteine change hair structure differently during perms, affecting hair strength and curling efficiency.
48 citations
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July 1996 in “Human & Experimental Toxicology” Human enzymes can detoxify harmful substances but might also increase their cancer risk.
August 2022 in “Clinical and Experimental Dermatology” Amino acid supplements may not be necessary for all women with chronic hair loss.
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.
88 citations
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July 1958 in “Nature” Citrulline was found in hair follicle proteins for the first time.
March 2005 in “Journal of the American Academy of Dermatology” Adding amino acids to damaged hair can improve its strength and appearance.
May 2026 in “Fibers and Polymers”
5 citations
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July 2006 in “Contact dermatitis” Ammonium bisulfite in hair bleach can cause facial eczema.
40 citations
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April 1999 in “Journal of Histochemistry & Cytochemistry” S100A3 protein is mainly found in specific parts of human hair cells.
37 citations
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February 2005 in “Journal of Investigative Dermatology” Overexpression of SSAT causes hair loss and skin issues, but reducing putrescine can help.
25 citations
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May 2003 in “Expert Opinion on Therapeutic Patents” Steroid Sulfatase inhibitors show promise in treating hormone-dependent disorders like cancers, hair loss, and acne, with 667COUMATE being a potential candidate for breast cancer treatment trials.
37 citations
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September 2003 in “Journal of Medicinal Chemistry” A substance called Compound 2g can strongly block STS (a hormone-related enzyme) without affecting estrogen levels, making it potentially good for treating breast cancer.
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.
February 2025 in “Animals” Amino acid-complexed trace minerals improve hair quality and activity in senior dogs.