What is the primary purpose of a skin barrier?

The primary purpose of a skin barrier is to protect the skin from environmental stressors. The skin barrier, specifically the stratum corneum, is the outermost layer of the skin that serves as a protective shield against various harmful elements, including pollutants, bacteria, and allergens. It plays a crucial role in maintaining skin hydration by preventing transepidermal water loss and ensuring that the skin retains moisture.

When the barrier is compromised, it can lead to sensitivity, irritation, and various skin issues, making it essential for the overall health and appearance of the skin. This protective function is foundational to skincare practices, as maintaining a healthy skin barrier is key to addressing other concerns like aging, discoloration, and irritation. While enhancing skin color, providing anti-aging benefits, or promoting makeup absorption are relevant aspects of skin care and aesthetics, these do not encompass the fundamental role the skin barrier plays in safeguarding the skin's integrity and health.