3 citations
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January 2009 in “Sen'i Gakkaishi” This study found that using a bicomponent reduction system with TGA and DTDG for hair straightening limited hair damage by forming only thiol groups, while a TGA-only system formed more damaging mixed disulfide groups.
3 citations
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January 2004 in “Sen i Gakkaishi” This study found that adding dithiodiglycolic acid to the hair straightening process decreased chemical damage and preserved the structural integrity of the hair matrix compared to using thioglycolic acid alone.
8 citations
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January 2009 in “Transactions of the Materials Research Society of Japan” This study found that CMAD wool keratin may protect human hair from damage during repeated bleaching and permanent waving treatments.
18 citations
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January 2008 in “Sen'i Gakkaishi” This study observed that repeated perm treatments decrease disulfide bonds in hair due to their conversion largely into cysteic acid, affecting the waving efficiency depending on the reduction agent used.
November 2021 in “Journal of pharmaceutical research international” This review examines the benefits and preparation methods of herbal versus chemical depilatories, highlighting the potential safety and efficacy advantages of herbal ingredients but provides no new experimental findings.