April 2026 in “Biomolecules” This study explores the use of discarded squid ink to create high-performance, bio-based hair colorants. Squid ink melanin nanoparticles (SIMNPs) were developed using ultrasound disruption and enzymatic hydrolysis, resulting in particles with improved solubility and reduced steric limitations. To enhance binding to hair, Fe(III) ions were used as supramolecular bridges. The dyeing process, optimized at pH 8.0, 45 °C, and 80 minutes, produced a stable deep black color that remained vibrant after 13 washes. Unlike traditional dyes, this method preserves hair's natural structure and offers UV protection. Safety evaluations showed no adverse effects, highlighting the potential of SIMNPs as a safe, sustainable alternative to conventional hair dyes.
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February 2017 in “ACS biomaterials science & engineering” Polydopamine is a safe, effective, and permanent hair dye that turns gray hair black in one hour.
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July 2018 in “International Journal of Cosmetic Science” Keratin-based particles safely improve hair strength, smoothness, and heat protection.
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November 2015 in “Trends in biotechnology” Gene regulation could revolutionize hair color by altering pigmentation from within.
March 2005 in “International Journal of Cosmetic Science” A new method helps understand hair shine and various products improve hair care.