Design And Development Of A Shampoo With Dark Semi-Permanent Dyes For Gradual Gray Hair Coverage

    April 2026 in “ Cosmetics
    Erika Paredes-Sulca, Felix Castillo-Morales, Adil Barrientos-Amau, Lucy Quispe-Rodriguez, Alison Zanabria-Santos, Dula Balbin-Inga, Gabriela Solano-Canchaya, Norma Ramos-Cevallos, Américo Castro-Luna, Bertran Santiago-Trujillo
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    Studysummary 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.
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