July 2024 in “Experimental Dermatology” AP collagen peptides help hair grow and improve hair health.
January 2024 in “Archives of Biological Sciences (Beograd)” AP collagen peptides may help hair grow better and become stronger.
September 2023 in “Journal of microbiology and biotechnology” A type of collagen helps hair grow by boosting cell growth and activating a specific hair growth pathway.
2 citations
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July 2023 in “Cosmetics” Surfactants in shampoos and conditioners remove some but not all lipids from hair, and more research is needed to understand their full impact.
June 2023 in “Skin Research and Technology” The supplement with amino acids, iron, selenium, and marine hydrolyzed collagen improved hair growth more than drug treatment alone, with most people tolerating it well.
October 2022 in “International Journal of Molecular Sciences” Fish collagen peptides can significantly promote hair growth.
11 citations
,
April 2022 in “Biophysical Journal” Disulfide bonds in keratin fibers break more easily under stress, especially when wet, affecting fiber strength.
11 citations
,
April 2020 in “Nutrafoods - International Journal on Nutraceuticals, Functional Foods and Novel Foods” 25 citations
,
May 2019 in “Cosmetics” 18-MEA and cationic surfactants can restore and maintain hair's hydrophobic nature, improving its beauty and feel.
21 citations
,
March 2017 in “Skin research and technology” Removing external lipids from hair reduces moisture and increases strength, while removing internal lipids decreases water permeability.
11 citations
,
January 2016 in “Biointerphases” The hair's outermost surface has multiple layers of lipids and proteins.
107 citations
,
October 2014 in “PeerJ” The study investigated the molecular structure of human hair using high-resolution X-ray diffraction, focusing on differences between individuals, including genetic similarities. Despite a small sample size of 12 individuals, the research found that the general molecular features of hair, such as the coiled-coil phase of α-helical keratin proteins and lipid layers, were consistent across all samples. However, variations in lipid types were noted, suggesting genetic influence, as identical patterns appeared in hair from genetically similar individuals like identical twins and a father-daughter pair, but not in fraternal twins. These findings highlighted the potential of using hair's molecular structure as a diagnostic tool for diseases.
107 citations
,
December 2013 in “International Journal of Dermatology” The document concludes that hair is complex, with a detailed growth cycle, structure, and clinical importance, affecting various scientific and medical fields.
76 citations
,
December 2011 in “Journal of Cell Science” Different keratin types have unique amino acid patterns that are evolutionarily conserved.
87 citations
,
July 2009 in “The journal of investigative dermatology/Journal of investigative dermatology” Human beard hair medulla contains a unique and complex mix of keratins not found in other human tissues.
10 citations
,
January 2009 in “Elsevier eBooks” Hair growth is influenced by hormones and goes through different phases; androgens can both promote and inhibit hair growth depending on the body area.
254 citations
,
January 2007 in “Chemical Society Reviews” Hair is a complex protein fiber with unique properties useful for developing hair products.
272 citations
,
September 2001 in “Journal of Biological Chemistry” The study cataloged human type II hair keratins, identifying six members divided into two groups: group A (hHb1, hHb3, hHb6) and group C (hHb2, hHb4, hHb5). Using specific antisera, a two-dimensional catalog was established, revealing isoelectric variants and their roles in hair differentiation. hHb5 and hHb2 were linked to early hair differentiation stages, while hHb1, hHb3, and hHb6 were expressed in advanced stages. hHb4 was found in the tongue, not hair follicles. The study suggested random keratin-pairing during differentiation and integrated type II keratins with type I and epithelial keratins into a comprehensive human keratin catalog.
33 citations
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October 1996 in “Journal of Investigative Dermatology” 65 citations
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February 1992 in “Development”
