January 2025 in “Journal of Raman Spectroscopy” Polarized Raman spectra can reveal changes in hair keratin's protein structures.
53 citations
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March 2006 in “Biopolymers” TTD hair is brittle due to fewer sulfur amino acids and unstable disulfide bonds.
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.
25 citations
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May 2019 in “Heliyon” Hair treatments cause significant structural changes, especially with excessive heat, regardless of ethnicity.
42 citations
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January 2011 in “Journal of Biomedical Optics” Infrared and Raman imaging can non-destructively analyze hair structure and help diagnose hair conditions.