24 citations
,
April 2016 in “Experimental Dermatology” This study found that chemical treatments like perming, dyeing, and bleaching significantly alter amino acids and lipids in human hair, which may impact hair strength and quality.
25 citations
,
May 2019 in “Cosmetics” This paper reviews the surface degradation of hair and describes how combining 18-MEA with specific surfactants can maintain hydrophobicity on bleached and weathered hair surfaces.
4 citations
,
November 2024 in “Scientific Reports” This study found that bioconjugating 16-methylheptadecanoic acid to damaged human hair can mimic the protective function of the original 18-methyleicosanoic acid, effectively restoring both the hair's external structural integrity and its internal moisture balance.
June 2024 in “ChemBioChem” This study's simulations suggest that replenishing free 18‐MEA could restore damaged hair surface properties, highlighting the importance of optimal fatty acid spacing for maintaining hair integrity.
April 2024 in “Research Square (Research Square)” This study found that bioconjugating 16-methylheptadecanoic acid (16-MHA) to damaged hair can mimic the protective properties of 18-methyleicosanoic acid (18-MEA), restoring the hair's structural integrity and moisture homeostasis, even after washing.
January 2011 in “Journal of Society of Cosmetic Chemists of Japan” This study found that a conditioner containing 18-MEA and SPDA can improve hair's smoothness and reduce flyaways, enhancing hair manageability.
49 citations
,
April 2010 in “International Journal of Cosmetic Science” This study details how very long human hair naturally ages, showing cuticle wear and internal fiber changes that may inform new hair care product designs.
43 citations
,
July 2005 in “Journal of Chromatography B” This study developed a sensitive method to precisely determine hair lipid composition, demonstrating specific lipid changes from the root to the tip in untreated hair fibers from two women.
41 citations
,
May 2005 in “International Journal of Cosmetic Science” This study observed that in Japanese females, hair lipid composition showed significant correlations, suggesting CH and CERs may act as a barrier against sebum-derived lipids.
36 citations
,
August 2011 in “Journal of dermatological science” This article examines the role and composition of integral hair lipids in forming a protective barrier similar to the skin's epidermal lipid layer and reports no new findings about their effects.
2 citations
,
October 2012 in “Experimental Dermatology” This study found that, despite the unchanged total level of 18-MEA, deletion of the Sox21 gene disrupts its attachment to the hair cuticle, increases cholesterol sulphate levels, and differentially affects ceramide composition.
27 citations
,
May 2019 in “Cosmetics” This review explores the structure and development of the hair cuticle, highlighting difficulties in studying some aspects and proposing new experimental approaches, but reports no new clinical results.
25 citations
,
December 2011 in “Surface and interface analysis” This study reports that hair damage from bleaching is associated with the oxidative cleavage of fatty acid thioester bonds, detectable by measuring the decrease in mass spectrometry peak at m / z 76.
23 citations
,
May 2010 in “Surface and interface analysis” This study found that chemical treatments such as hair bleach and UV radiation significantly reduced the amount of 18-methyleicosanoic acid on the outer surface of human hair.
October 2025 in “Coloration Technology” In this study, a new delipidisation method that removes over 97% of key lipids from wool rapidly and without yellowing was reported to improve wool processing and printing quality.
11 citations
,
January 2016 in “Biointerphases” This study suggests that the outermost hair cuticle surface is rich in 18-methyleicosanic acid (18-MEA), supporting previous findings of its multilayer lipid and protein structure.
July 2026 in “Scientific Reports” This study found that wool felting in Ukrainian Carpathian Mountain sheep is linked to significant changes in fatty acid composition, particularly highlighting a decrease in 18-methyleicosanoic acid in bound lipids, suggesting it as a potential marker for cuticle lipid layer damage during felting.
August 2013 in “日本医療薬学会年会講演要旨集” This study found that hair contains tightly bound lipids such as cholesterol sulfate, cholesterol, fatty alcohols, and free fatty acids, which are resistant to solvent extraction.
This study used molecular dynamics simulations to illustrate the complex molecular behavior of the hair surface F-layer, highlighting how fatty acids interact with 18-MEA under different conditions.
December 2025 in “Universal library of medical and health sciences.” This study analyzes contemporary theories and practices to understand key factors influencing the development of the examined phenomenon, proposing trends and practical applications for researchers and practitioners, while acknowledging study limitations and suggesting future research directions.
75 citations
,
January 2014 in “Archiv Der Pharmazie” This review discusses the synthesis and biological activities of jasmonates, highlighting their potential as drugs and prodrugs, but reports no new clinical results; further research and trials are anticipated.
1 citations
,
June 2019 in “Food Research” In this study, tempeh oil rich in PUFAs, particularly from black soybean, significantly down-regulated MMP-9 gene expression in UVB-irradiated mice skin, indicating potential for use in preventing skin photoaging.
138 citations
,
July 2015 in “Clinical, Cosmetic and Investigational Dermatology” This review discusses how Western diet may contribute to acne vulgaris through insulin signaling and metabolomic changes, promoting a dietary approach for management, but reports no new experimental results.
8 citations
,
November 2019 in “Clinical Science” This study found that higher levels of DHA from omega-3 fatty acids delayed inflammation resolution and impaired wound healing quality in both transgenic mice and wild-type mice supplemented with DHA.
35 citations
,
January 2011 in “Journal of Biological Chemistry” This study found that overexpression of sPLA2-X in mice was associated with alopecia and hair follicle abnormalities, highlighting its potential role in hair follicle homeostasis.
4 citations
,
January 2021 in “Skin appendage disorders” This review discusses hair straightening techniques, products, and safety risks, providing guidance for dermatologists to advise patients effectively; it reports no new clinical results.
14 citations
,
October 2016 in “Psychoneuroendocrinology” This study identified significant changes in the expression of nine proteins in the nucleus accumbens of rats treated with finasteride, suggesting potential novel targets for its neuropsychiatric effects.
December 2025 in “Biopolymers” This study found that chemically treated hair, particularly when subjected to both acid straightening and bleaching, experiences more significant structural damage when exposed to heat, highlighting key changes in both the internal and surface components of hair fibers.
12 citations
,
June 2022 in “International Journal of Molecular Sciences” In this study, copper was found to promote the proliferation of dermal papilla cells in Rex rabbits by maintaining the function of the cellular mitochondrial electron transport chain.
18 citations
,
August 2014 in “Lipids” This study found that unsaturated fatty acids are more abundant in the cortex of human hair than on its surface, and steryl glycoside-like lipids may help bind the cuticle to the cortex.