Skin hydration serves as both a fundamental requirement and a top priority in skincare. Guangdong DAAO Cosmetics OEM Manufacturer emphasizes that maintaining the skin's hydration status is a critical factor in preserving the structural integrity and barrier function of the skin.

It is important to understand that our skin's barrier function relies on the "brick and mortar" structure of the stratum corneum (the outermost layer of the skin). In this analogy, the keratinocytes act as the "bricks," while the stacked lamellar lipids serve as the "mortar" binding them together. These components are tightly and securely interlinked; this arrangement not only prevents excessive loss of water and electrolytes but also blocks the intrusion of harmful external substances, thereby effectively fulfilling the role of a robust skin barrier.

However, if the skin's capacity to retain moisture diminishes, it leads to a decline in its barrier function. This compromised barrier function, in turn, further impairs the skin's ability to retain moisture, creating a vicious cycle. Consequently, Guangdong DAAO Cosmetics OEM Manufacturer points out that—for the sake of maintaining a healthy skin barrier—hydration is an essential element not only for sustaining physiological skin functions and delaying skin aging but also for the prevention and treatment of various skin conditions.

Furthermore, the water content of the stratum corneum typically accounts for 20% to 35% of the epidermis's total composition; if this level drops below 10%, the skin becomes dry, rough, and prone to flaking. Moisture within the stratum corneum is indispensable for both the proper maturation of the layer and the process of normal desquamation (natural shedding of dead skin cells). Moreover, excessive loss of epidermal moisture can impair the enzymatic activity required for normal desquamation, resulting in visible signs of dryness, roughness, and scaling.

Therefore, when the skin appears dry, it signifies more than just a simple lack of water; rather, it indicates a functional abnormality in the stratum corneum's water-retention mechanisms. This is because the skin's water content serves as a primary indicator of its overall health status, as well as a crucial parameter for assessing the severity of skin conditions associated with moisture loss.