Healthy barrier function is vital to maintaining proper levels of hydration. Water loss from the skin through evaporation is increased when the skin’s barrier is disturbed by injury, environmental pollutants, UV radiation and stress. The ability of the top layers of the skin to resist moisture loss depends on the presence of essential fatty acids. This is water binding and enhance the outer barrier of the skin to reduce transdermal water loss. They also help regulate sebum production. Sebum is the skin’s own natural oil. Its main purpose is to waterproof and protect the skin from drying out.
Argan oil’s Vitamin E, squalene and sterols are important factors in moisture restoration and retention. Vitamin E protects the integrity of essential fatty acids, and both vitamin E and squalene accumulate in the epidermis. Squalene is a nutrient-rich oil with the unique ability to anchor itself to the cell membrane and so protect against moisture loss at the site of each cell. Sterols work synergistically with human sterols to promote excellent moisture retention and play a fundamental role in aiding and maintaining optimal skin barrier function.