Treatment
Facial creams were selected to investigate their effectiveness in managing potential skin changes caused by indoor conditions during winter. The key ingredients of the creams include ceramide NP, ectoin, glycerin, trehalose, and 2,3‐butanediol to improve the skin barrier and moisturize it.After the baseline measurement, approximately 0.3 g of cream was applied to one side of the face (randomized among the participants). For the forearm, 12 μL of cream was applied to the treated site in a 2 × 2 cm area (randomization) and the sleeve was rolled up to allow the area to be exposed to the environment.