This study examined the effects of one-time versus two-time hair bleaching in people from Padang City, finding that two-time bleaching significantly increased hair dryness and reduced elasticity compared to one-time bleaching, emphasizing the importance of considering bleaching frequency for hair health.
November 2024 in “Majalah Farmasetika” In this study, the researchers explored a hair dye gel formulated with Indonesian native plant extracts and found it produced stable brown shades on bleached hair, with the most preferred dark brown achieved at a 12% concentration, and showed no skin irritation.
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June 2010 in “Journal of dermatology” In this study, hair bleaching with ammonium persulfate and hydrogen peroxide caused significant damage to hair structure and severe skin reactions in rats, highlighting the need for cautious bleaching procedures.
July 2023 in “European Journal of Medical and Health Research” In this study, bond-protecting additives combined with low-volume oxidants were shown to reduce hair damage in fine hair by up to 62% compared to standard bleach methods, offering a safer bleaching approach for colorists working with this hair type.
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September 2021 in “Data in brief” This study observed that bleaching brown human hair with persulfate salts and hydrogen peroxide induced significant conformational changes in keratin, particularly affecting disulfide bridges and oxidized sulfur species, which may inform the development of hair restorative treatments.