January 2026 in “Digitalen Hochschulbibliothek Sachsen-Anhalt (Universitäts- und Landesbibliothek Sachsen-Anhalt)” Keratin from chicken feathers can be safely used for skin benefits.
10 citations
,
December 2001 in “PubMed” The conclusion is that substances can penetrate hair fibers through multiple pathways, including both the cell membrane complex and the non-keratinous parts.
January 2014 in “Journal of Investigative Dermatology” Proteins like aPKC and PDGF-AA, substances like adenosine and ATP, and adipose-derived stem cells all play important roles in hair growth and health, and could potentially be used to treat hair loss and skin conditions.
7 citations
,
February 1998 in “Polymer journal” Keratin structure in hair is stable at pH 5-6 but disrupts between pH 6-7.
January 2025 in “International Journal of Cosmetic Science” Citric acid strengthens and improves damaged hair.
42 citations
,
June 2019 in “Aging” 3,4,5-tri-O-caffeoylquinic acid promotes hair growth by activating the β-catenin pathway.
40 citations
,
September 2010 in “Journal of Biological Chemistry” Keratin K80 is an ancient protein found in various tissues, important for cell structure and tissue differentiation.
January 2000 in “Acta Academiae Medicine Militaris Tertiae” Different keratins in hair follicles can help identify hair tumor origins.
January 2013 in “Sen'i Gakkaishi” Microfibrils are key for permanent waves, and hydrolyzed keratin improves wave formation and hair condition.
53 citations
,
July 1981 in “Journal of Endocrinology” α-MSH and cyclic AMP boost melanin production, while cyclic GMP and melatonin reduce it.
January 2026 in “Applied Sciences” Cyclic ADP-ribose helps regulate calcium and signals that promote hair growth in hair follicle cells.
Ceramide may help delay hair aging by restoring stressed hair cells.
January 1991 in “Acta Dermato Venereologica” A new method effectively visualizes keratin in hair without harsh chemicals.
3 citations
,
October 2024 in “International Journal of Molecular Sciences” CRET therapy affects inflammation in skin cells by changing cytokine levels and activating certain proteins.
45 citations
,
March 1997 in “Journal of Investigative Dermatology” 45 citations
,
February 2002 in “International Journal of Cosmetic Science” Ceramide helps protect African–American hair from breakage.
33 citations
,
January 1997 in “Journal of Investigative Dermatology” 6 citations
,
April 1993 in “Journal of Dermatological Science” Certain substances can strongly inhibit DNA synthesis in hair cells.
69 citations
,
January 2009 in “Advances in Materials Science and Engineering” Wool keratin is reactive, biocompatible, biodegradable, and can model keratin from other sources.
3 citations
,
December 2018 in “Routledge eBooks” Hair is made of strong keratin fibers that protect against the environment.
1 citations
,
August 2020 in “CRC Press eBooks” Hair growth can be influenced by manipulating keratin and growth factor genes.
May 2006 in “The Journal of Cell Biology” Keratin 17 is crucial for cell growth in wound healing by aiding protein synthesis.
51 citations
,
September 2012 in “Biomacromolecules” Disulfide bonds make keratin in hair stronger and tougher.
December 2022 in “Scientific Reports” Compound 4 is a promising treatment for hair loss with low toxicity.
Hair keratin treatments can be harmful, potentially causing health issues like skin reactions and cancer.
7 citations
,
January 1981 in “Springer eBooks” Certain small molecules and polymers can change hair's physical properties and how it feels by affecting the bonds within the hair.
Brazilian keratin treatment can cause skin reactions like eczema.
October 2012 in “한국미용학회지” For best curls and hair health, use keratin and ceramide after rinsing, or skip rinsing for stable curls.
1 citations
,
January 2013 Glucosylceramides are essential for healthy skin and proper wound healing.
Water and fatty acids affect hair's surface differently based on hair damage, and models can help understand hair-cosmetic interactions.