January 2026 in “Health Food & Biotechnology” This study developed a sustainable biotechnological process using Bacillus licheniformis strains to produce keratin hydrolysate from chicken feathers, and found that cosmetic hair serum with this ingredient improved hair smoothness, elasticity, and shine in a small focus group.
34 citations
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April 2012 in “Molecular Biology Reports” This study isolated a thermophilic bacterial strain, Bacillus cereus, from soil that produces an extracellular protease; the enzyme effectively removed non-leather structures from animal pelts and was compatible with commercial detergents.
28 citations
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December 2011 in “Biocatalysis and biotransformation” This study found that a peptide treatment using Protein disulphide isomerase improved the mechanical and thermal properties of over-bleached hair by promoting deeper peptide penetration and attachment.
26 citations
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May 2021 in “International Journal of Molecular Sciences” In this review, researchers examined the physiological benefits of Cheonggukjang, a salt-free fermented soybean paste, highlighting its various health-promoting components that may contribute to improved heart health, diabetes management, and cancer prevention, among other benefits.
January 2007 in “Sen'i Gakkaishi” This study found that Mf-rich-fiber in human hair underwent significantly greater degradation by proteases than Ma-rich-fiber, especially when treated with Proteinase K.