Cleansing-induced changes in skin measured by in vivo confocal raman spectroscopy

Skin Research and Technology : Official Journal of International Society for Bioengineering and the Skin (ISBS) [and] International Society for Digital Imaging of Skin (ISDIS) [and] International Society for Skin Imaging (ISSI)
Mark A Davies

Abstract

One of the most important steps people can take in reducing the spread of bacteria and viruses is washing the hands with soap and water. Frequent washing, required in certain occupations, can lead to skin dryness, chapping, and itching. In vivo confocal Raman spectroscopy was used to study short-term effects of hand washing on product deposition, lipid acyl chain structural disordering, and extraction of important skin components such as natural moisturizing factors, cholesterol, ceramides, amino acids, and changes in skin hydration. Effects of use of either soap, synthetic detergent, or triethanolamine (TEA)-soap/ glycerin were compared at two water temperatures. Soap use resulted in significant deposition at all depths to 20 μm at 25°C and at the surface and 2 μm at 37°C. Significant decreases were observed in relative amounts of all skin components studied. NMF levels were not changed. Skin dehydration was observed for use of soap at 37°C. Short-term effects of frequent hand washing can be monitored with in vivo confocal Raman spectroscopy. Effects of frequent washing may be reduced with lower wash temperature and products. Skin dehydration is not associated with lipid chain disordering.

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Citations

Feb 4, 2021·Biomicrofluidics·Magalí Mercuri, David Fernandez Rivas

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