April 2026 in “Cosmetics” This study developed and tested a shampoo with semi-permanent dyes designed to gradually cover gray hair, reporting maintained stability and effective gray–black coloration on high-canities hair tresses through eight wash cycles.
19 citations
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January 2012 in “Annals of Dermatology” This article recommends creating a system to educate users about the ingredients and side effects of hair coloring products and does not report new research findings.
8 citations
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January 2013 in “Annals of Dermatology” This study found that hair dyeing is more common among Korean women than men and among individuals with significant grayness, and it was not linked to higher scalp disease prevalence.
1 citations
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June 2023 in “Skin Research and Technology” This study found that two shampoos with different dyeing methods had varying abilities to dye hair and impact hair health, suggesting that individuals should select hair color shampoos based on their personal needs.
63 citations
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February 2017 in “ACS biomaterials science & engineering” In this study, polydopamine emerged as a safe and effective alternative to traditional hair dyes like PPD for dyeing gray hair permanently, showing resistance to detergents and causing less toxicity and hair loss in mice.
