35 citations
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January 2017 in “International Journal of Food Properties” This study observed that a peptide showed higher antioxidant and metal ion chelation activity compared to its encapsulated version cross-linked in calcium alginate beads.
7 citations
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January 1982 in “Acta agriculturae Scandinavica” Mink use L-methionine and L-cystine slightly better than natural amino acids for hair growth, but D-methionine is not effective.
5 citations
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November 2025 in “Biomolecules” This review examines the benefits of topical hyaluronic acid in cosmetic applications, noting its ability to penetrate the skin in low-molecular-weight forms and highlighting safety supported by clinical trials.
1 citations
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January 1971 in “Acta dermato-venereologica” Mice hair follicles take in the amino acid cystine.
May 2023 in “Pharmaceuticals” In this in silico study, researchers analyzed nonsynonymous SNPs in the LIPH gene linked to hypotrichosis and identified three potentially harmful variants (W108R, C246S, and H248N) out of 215 total, using sequence- and architecture-based bioinformatics techniques to differentiate between harmful and benign SNPs.
July 2023 in “Nature Reviews Chemistry” A new method strengthens hair without using harmful chemicals.
April 2026 in “International Journal of Biological Macromolecules” 67 citations
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December 1990 in “The journal of cell biology/The Journal of cell biology” This study identified two evolutionarily conserved ultra-high-sulfur keratin proteins in human and sheep hair follicles, which are specifically expressed in the hair cuticle during the late stages of fiber development.
2 citations
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August 1987 in “Analytical Biochemistry” This study introduced a method to isolate and separate microfibrillar proteins from human hair, identifying previously undetected glycine- and tyrosine-rich proteins.
September 2025 in “Journal of Surfactants and Detergents” In this study, shampoos containing sodium lauroyl methylaminopropionate showed superior coacervate formation and lubrication on wet hair, outperforming other amino acid surfactants and suggesting potential for creating low-irritation, high-performance hair products.
September 2019 in “Journal of Investigative Dermatology” This study found that a new formulation using short chain esters and ethanol can selectively deliver hydrogen peroxide to hair follicles during epilation, causing follicular damage without affecting epidermal keratinocytes.
46 citations
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November 1963 in “Journal of Histochemistry & Cytochemistry” In this study, researchers localized arginine and citrulline in rat hair follicles and found that arginine is abundant in trichohyalin droplets, while citrulline predominantly accumulates in the hardened inner sheath and medulla.
October 2025 in “Nephrology Dialysis Transplantation” In this case report, a young woman experienced acute kidney injury linked to the use of a hair straightening product containing glyoxylic acid, suggesting dermal absorption may lead to calcium oxalate nephropathy; this highlights the need for regulatory review and public health intervention.
February 2025 in “International Journal of Cosmetic Science” This research studied European human hair, finding that cysteic acid and protein carbonylation increased with both chemical and photochemical oxidation. Protein carbonylation was highlighted as a more sensitive marker for photochemical oxidation, providing better in situ visualization of hair damage than cysteic acid.
This research found that keratin hydrogels derived from human hair may support cell viability and proliferation, indicating potential as 2D and 3D soft tissue culture scaffolds.
January 2016 in “Indian journal of drugs in dermatology” This case report describes a 48-year-old male with severe, itchy hypertrophic lichen planus who showed a 90% improvement in lesions following 4 months of treatment with oral acitretin, with no recurrence 6 months posttreatment.
September 2025 in “OPAL (Open@LaTrobe) (La Trobe University)” This study developed a biobased copolymer called SELP::KP, showing improved hair strength, elasticity, and conditioning properties while being a safer alternative to conventional chemical treatments, based on application to human hair in a laboratory setting.
June 2024 in “Current Developments in Nutrition” In this study, KeraGLO, a nutritional supplement with hydrolyzed keratin, was shown to significantly improve skin wrinkle depth, smoothness, moisture, firmness, and hair health in healthy adult females over a 90-day period at both 500mg and 1000mg doses compared to baseline.
45 citations
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June 2008 in “Journal of pharmaceutical and biomedical analysis” This study developed a new HPLC method for detecting prohibited substances like minoxidil and hydrocortisone in cosmetic products, achieving high sensitivity and successful application to real-world samples.
24 citations
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November 1997 in “Journal of Biological Chemistry” This study found that genes encoding mouse high-glycine/tyrosine proteins show distinct spatial and temporal expression patterns in hair follicles, suggesting diverse protein distribution during hair growth cycles.
108 citations
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October 2003 in “Journal of biological chemistry/The Journal of biological chemistry” This study documents that trichohyalin acts as a multi-functional cross-bridging protein in the inner root sheath of mouse hair follicles, enhancing mechanical strength by linking keratin filaments to the cell envelope.
April 2018 in “Journal of Investigative Dermatology” In this study, researchers found that stabilizing the protein HIF1A in hair follicles promotes glycolysis over oxidative phosphorylation, potentially reducing oxidative stress and supporting hair growth.
36 citations
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October 2014 in “Langmuir” This study concluded that bleach treatment partly transforms the hydrophobic top layer of human hair cuticles into a hydrophilic surface with clustered cysteic acid, visualized at the nano-scale using dynamic Chemical Force Microscopy.
May 2026 in “European Cells and Materials” In this study, researchers developed a novel delivery system using hyaluronic acid gels to encapsulate Huperzine A for Alzheimer's treatment, achieving extended release over 20 days and significantly improving pathology and behavior in mice, including enhanced memory and reduced neuroinflammation.
98 citations
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November 2014 in “PLoS ONE” In this study, bovine testes hyaluronidase accelerated wound healing in vitro and in vivo by enhancing cellular proliferation, reepithelialization, and modulating inflammation in rat models.
1 citations
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November 2022 in “Molecules/Molecules online/Molecules annual” This study found that low-molecular-weight hyaluronate significantly improved the mechanical strength and elastic modulus of overbleached hair by enhancing hydrogen bond networks within keratin.
4 citations
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November 2022 in “Journal of biomedical materials research. Part B, Applied biomaterials” This study demonstrated that human hair keratins have strong antioxidative properties, providing protection against oxidative stress in human dermal fibroblasts, suggesting their potential as antioxidizing supplements.
1 citations
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January 2025 in “Proceedings of the National Academy of Sciences” This study used cryoelectron microscopy to unveil the structure of LPA-bound human LPAR6, revealing unique ligand binding and recognition modes distinct from LPAR1, which may aid in designing targeted compounds for hair loss and cancer.
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.
29 citations
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August 1999 in “Journal of Investigative Dermatology” New mutations in hair keratin genes cause the rare hair disorder monilethrix.