Skin hydration was evaluated using a capacitance method (Corneometer® CM 825, Courage+Khazaka Electronic, GmbH, Cologne, Germany). The barrier function was evaluated by measuring transepidermal water loss (TEWL) using the Tewameter® TM300 (Courage+Khazaka Electronic, GmbH). At each time point, measurements were performed at three sites on the face and two sites on the body (i.e., arm and waist). Three recordings were obtained for each of these different areas and the average was calculated.
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