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. 2021 Feb 5;14(4):745. doi: 10.3390/ma14040745

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© 2021 by the authors.

Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).

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Skin color after application of films based on sodium alginate and gelatin with different amounts of glycerol and lipids, as well as the sample with incorporated PLA microparticles. The control measurements were performed before the application of materials to the skin, whereas time = 0 refers to the tests taken immediately after removal of the films that had been applied to the skin for 10 min. * indicates a difference at p < 0.05 between the results at an appropriate time compared to the results made for the control field.