The moisture barrier is the outer surface of the skin including the stratum corneum, the outermost layer of the epidermis. The stratum corneum is composed of skin cells, lipids, and natural moisturizing factors like amino and fatty acids. It has a “brick and mortar” composition with skin cells as the “bricks” and lipids (or oils) forming the “mortar” which functions to move moisture between cells.

One of skin’s major function is protection which the moisture barrier plays an important part in. A healthy moisture barrier can help defend against environmental aggressors like the sun and pollution. In addition to protection, the moisture barrier also helps retain and regulate moisture within the skin.

When a moisture barrier is damaged or compromised, it is more susceptible to external aggressors like UV rays and pollution which can more easily penetrate skin. A damaged moisture barrier can also experience a loss of water and nutrients which can throw off its moisture balance. When this balance is disrupted, skin can lose its suppleness, look dull or uneven, feel tight or uncomfortable, and may even experience dryness, redness, imperfections or blemishes.

Skin’s moisture barrier can be affected by a range of factors – from changes in your immediate climate to a long airplane ride to UV damage. These changes may affect skin’s rate of water evaporation which not only causes skin to look and feel dry but also makes it more prone to other damage. Some of the key causes include:

A healthy moisture barrier works effectively at retaining moisture and helping to protect skin from aggressors and irritants. Maintaining balanced moisture levels within the skin by using a daily moisturizer or facial cream can help create a foundation for delaying sings of aging and maintain its ability to protect itself. When the moisture barrier is healthy and resilient, skin feels smooth and hydrated and looks radiant and younger-looking.

To get a sense of your moisture barrier, look first at how your skin looks and feels. Irritation, blemishes and dryness can all indicate that you might have a damaged moisture barrier. Signs can vary widely by skin type – damaged oily skin might produce more oil while damaged dry skin might become rough or flaky.

For better accuracy, visit your local Kiehl’s for a complimentary skincare consultation. In as little as 5 minutes, a Kiehl’s Skincare Expert can check the condition of your skin barrier and its hydration levels. Your representative will also recommend a custom routine with formulas uniquely targeted needs.