In daily life, many people struggle with dry skin, especially when they use moisturizers but still feel dryness. What is the reason behind this? Today, we will explore the sources of skin moisture, the science of hydration, and how to choose the right moisturizing products.
First, it is essential to understand the physiological characteristics of dry skin. The moisture in dry skin primarily comes from two sources: intrinsic moisture and dynamic moisture. Intrinsic moisture is provided by the stratum corneum, which is formed by cells gradually moving up from the basal layer and transforming. During this process, the component filaggrin helps retain moisture and skin elasticity. However, the moisture retention ability of the stratum corneum is often related to genetics; if there are individuals with dry skin in your family, you may also be affected.
In addition to hydration, the health of the stratum corneum is also related to its barrier function. Lipids in the skin, such as ceramides and cholesterol, help maintain this barrier to prevent moisture loss. However, due to environmental influences, especially in dry climates, this protective barrier may weaken, leading to increased dryness.
Many might believe that drinking more water can improve dry skin, but in reality, the skin’s moisture is released from the stratum corneum and does not solely depend on water intake. Therefore, improving dry skin requires more than just increasing water consumption; choosing suitable moisturizing products is critical.
When selecting a moisturizer, pay attention to its ingredients. A good moisturizing product should include humectants that absorb moisture and occlusive agents that seal in moisture. Common humectants include glycerin and propylene glycol, while occlusive agents typically consist of plant oils and mineral oils. This formulation can help maintain skin moisture and enhance hydration.
If your skin has been persistently dry, consider seeking a doctor’s advice. Sometimes, using effective products that promote cell turnover, such as alpha hydroxy acids or retinoids, may be necessary to improve skin condition and restore its suppleness and smoothness. Additionally, doctors can provide personalized care recommendations suitable for your skin type.
Moreover, for those with dry skin concerns, it is also vital to avoid prolonged stays in air-conditioned environments and to pay attention to sun protection in daily care. Extended exposure to air conditioning can accelerate moisture loss and make the skin drier. Lastly, regardless of which moisturizing product you choose, consistent care and appropriate lifestyle habits are crucial for improving dry skin.