Skin Care and Aesthetics Practice Exam

Essential fatty acids (EFAs) are vital nutrients that the body cannot synthesize on its own and therefore must be obtained through diet. They play a crucial role in maintaining skin health, particularly through their contribution to the skin barrier function.

The skin barrier, primarily composed of lipids, protects against environmental aggressors, prevents water loss, and retains moisture. Essential fatty acids, such as omega-3 and omega-6 fatty acids, are instrumental in forming and maintaining this lipid barrier. They help improve the skin's elasticity and resilience, support cellular functions, and reduce transepidermal water loss, which is vital for maintaining hydration levels within the skin.

By ensuring adequate levels of essential fatty acids, the skin stays supple, hydrated, and less prone to conditions such as dryness, inflammation, and irritation. This highlights their importance in skincare and emphasizes why they are considered essential for overall skin health.