Maintaining healthy, glowy, and youthful-looking skin is heavily dependent on several interrelated factors, including the skin’s ability to retain moisture (hydration), its ability to prevent water loss through the outermost layer (transepidermal water loss or TEWL), the health of the skin’s microbiome, and the strength of its protective barrier. Having well-hydrated skin is an essential aspect of achieving and maintaining a healthy, glowing, and youthful appearance.