January 2026 in “Molecules” In this study, the novel thiol-Michael click perming molecule, MA2-CySS, achieved repeatable perming with reduced oxidative damage, preserving hair keratin's structure while maintaining efficiency comparable to traditional oxidative methods.
This study found that exposure to Prussian Blue caused significant detachment of cuticle segments from the hair shaft in both new and aged human hairs.
January 2024 in “International Journal of Cosmetic Science” This study found that 1,4-n-butylene dimaleate can restore the mechanical properties of reduced hair by reconnecting disulfide bonds and improving the hair's structural integrity using a thiol-Michael click reaction, compared to untreated reduced hair.
20 citations
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December 2012 in “Journal of molecular structure” This study found that at pH 9.0, CYS penetrated less and caused less damage to virgin human hair than TG because it barely reached the cortex region.
9 citations
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October 1946 in “Experimental biology and medicine” This study reported that supplementation with inositol, biotin, cystine, or methionine prevented hair loss in rats fed soybean oil meal, with cystine and methionine also significantly increasing growth rates.