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Lake Zeiļu Clay Application Induced Changes in Human Skin Hydration, Elasticity, Transepidermal Water Loss and PH in Healthy Individuals

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Faculty of Medicine, Rīga Stradiņš University, 16 Dzirciema iela, LV-1007 Riga, Latvia
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Chemistry, Biology and Biotechnology Research Center, Institute of Engineering, Faculty of Engineering, Rezekne Academy of Technologies, 115 Atbrīvošanas aleja, LV-4601 Rezekne, Latvia
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Information and Communication Technologies Research Center, Institute of Engineering, Faculty of Engineering, Rezekne Academy of Technologies, 115 Atbrīvošanas aleja, LV-4601 Rezekne, Latvia
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Department of Dermatology and Venereology, Rīga Stradiņš University, 18 Baznīcas iela, LV-1010 Riga, Latvia
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Author to whom correspondence should be addressed.
Cosmetics 2020, 7(3), 51; https://doi.org/10.3390/cosmetics7030051
Received: 21 May 2020 / Revised: 8 June 2020 / Accepted: 17 June 2020 / Published: 29 June 2020
(This article belongs to the Special Issue Feature Papers in Cosmetics in 2020)
Clay has a great biomedical application potential, however there are just a few instrumental studies and the impact of lake clay on the skin has not yet been studied. The DermaLab skin analysis system (Cortex Technology) was used for hydration, elasticity, transepidermal water loss (TEWL) and pH measurements after lake clay facial applications. Research included short-term tests (measurements 20 and 60 min after clay application) and long-term tests (application every 4th day for 3 weeks with measurements 20–24 h post-application). Control measurements and application tests to exclude contact allergy were made beforehand. No volunteer (n = 30) had positive allergic reaction. The matched-pairs design was applied: the right and left parts of forehead were used for the test and control groups. The Wilcoxon signed-rank test (significance level p = 0.001) was applied for statistical analysis. There were statistically significant pH changes demonstrated during the short-term measurements. The long-term measurements provided data that clay significantly improves skin hydration and elasticity. View Full-Text
Keywords: clay; skin; elasticity; hydration; pH; transepidermal water loss clay; skin; elasticity; hydration; pH; transepidermal water loss
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Misiņa, S.M.; Tretjakova, R.; Kodors, S.; Zavorins, A. Lake Zeiļu Clay Application Induced Changes in Human Skin Hydration, Elasticity, Transepidermal Water Loss and PH in Healthy Individuals. Cosmetics 2020, 7, 51.

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