Next Article in Journal
Development and Stability Evaluation of Liquid Crystal-Based Formulations Containing Glycolic Plant Extracts and Nano-Actives
Previous Article in Journal
Chemical Stability Analysis of Hair Cleansing Conditioners under High-Heat Conditions Experienced during Hair Styling Processes
Open AccessArticle

Mechanism of Cuticle Hole Development in Human Hair Due to UV-Radiation Exposure

1
School of Bioscience and Biotechnology, Tokyo University of Technology, Tokyo 192-0982, Japan
2
Bionics Program, Tokyo University of Technology Graduate School, Tokyo 192-0982, Japan
*
Author to whom correspondence should be addressed.
Cosmetics 2018, 5(2), 24; https://doi.org/10.3390/cosmetics5020024
Received: 17 February 2018 / Revised: 18 March 2018 / Accepted: 18 March 2018 / Published: 21 March 2018
Hair is easily damaged by ultraviolet (UV) radiation, bleaching agents or permanent wave treatments, and as damage progresses, hair loses its gloss, develops split ends and breaks. However, the causes of hair damage due to UV radiation have not yet been clarified. We discovered that in one mechanism facilitating damage to wet hair by UV radiation, the unsaturated fatty acids in wet hair produce hydroxy radicals upon exposure to UV radiation, and these radicals produce cuticle holes between the cuticle layers. In wet hair exposed to UV radiation, cuticle holes were produced only between the cuticle layers, whereas when human hair was immersed in a solution containing hydroxy radicals produced by Fenton’s reaction, a random production of cuticle holes was noted. It is thought that hydroxy radicals are produced only between the cuticle layers by exposure to UV radiation, and cuticle holes are formed only in this region because one of the polyunsaturated fatty acids, linoleic acid, with a bis-allyl hydrogen, is found between the cuticle layers. View Full-Text
Keywords: UV damage; cuticle hole; hydroxy radical; free fatty acids UV damage; cuticle hole; hydroxy radical; free fatty acids
Show Figures

Figure 1

MDPI and ACS Style

Maeda, K.; Yamazaki, J.; Okita, N.; Shimotori, M.; Igarashi, K.; Sano, T. Mechanism of Cuticle Hole Development in Human Hair Due to UV-Radiation Exposure. Cosmetics 2018, 5, 24.

Show more citation formats Show less citations formats
Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.

Article Access Map by Country/Region

1
Back to TopTop