December 2022 in “Deleted Journal” In this study, topical application of keratin extract from wool promoted hair growth in mice by reducing the time for initiation and completion of growth phases and improving hair quality.
7 citations
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September 2020 in “International Journal of Cosmetic Science” This study investigated the effects of wool-derived hydrolysed keratin peptides on relaxed textured hair and found that mid- and high-molecular weight peptides improved mechanical strength and reduced breakage in different humidity conditions.
This study found that a bio-based repair solution containing hydrolysed wool keratin, serine, and transglutaminase improved the physical and chemical properties of damaged hair, increasing its strength, flexibility, and thermal stability while offering long-lasting protection against chemical damage.
January 2013 in “Transactions of the Materials Research Society of Japan” In this study, carboxymethylalanyl disulfide keratin was shown to effectively prevent hair damage during repeated bleaching and permanent waving treatments.
69 citations
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January 2009 in “Advances in Materials Science and Engineering” This study demonstrated that keratin can be effectively extracted from wool using alkaline solutions and that the extracted keratin maintains reactivity similar to that from other low-value sources like cattle hair.