What is the primary function of the milk protein in this sheet mask, and how does it benefit dull or dehydrated skin?

The El'Skin MILK Nourishing Sheet Mask relies on milk protein as its key active ingredient to address skin that appears dull, feels tight, or has become rough due to environmental factors like heating seasons, travel, or lack of sleep. The milk protein is rich in amino acids, which play a specific role in skin hydration. These amino acids are utilized by the outer layers of the epidermis to enhance the skin's ability to retain moisture effectively. This internal hydration mechanism helps to reduce the dry, flaky appearance that often contributes to an uneven or tired complexion.

Beyond hydration, the smoothing effect of the milk protein allows light to reflect more evenly across the skin's surface. When the skin is better hydrated and the texture is refined, the face can appear naturally brighter and more rested. This makes the mask a practical choice for those seeking a quick moisture boost and a smoother complexion without the need for heavy cream layers. The sheet format itself supports this process by sitting closely against facial contours, keeping the essence in contact with the skin longer to soften rough patches and leave the surface feeling supple.