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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.
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August 1984 in “Journal of the American Academy of Dermatology” Low-sulfur hair syndrome can cause UVB sensitivity and testicular failure.
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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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January 1997 in “Dermatology” Two siblings were diagnosed with Trichothiodystrophy, identified by brittle hair and low sulfur content.
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November 2014 in “Proteins Structure Function and Bioinformatics” Cysteines in wool fibers are accessible and form important disulfide bonds.
March 2005 in “Journal of the American Academy of Dermatology” Adding amino acids to damaged hair can improve its strength and appearance.
September 2025 in “Journal of Surfactants and Detergents” Shampoos with sodium lauroyl methylaminopropionate improve hair lubrication and reduce irritation.
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December 2018 in “Macedonian Journal of Chemistry and Chemical Engineering” A new method accurately measures amino acids in treated hair, showing bleaching reduces amino acids while protein treatments increase them.