The ceramides are natural lipids that constitute approximately 50% of the skin barrier, located in the outermost layer of the skin, the epidermis. These molecules play a crucial role in holding cells together, protecting against water loss and the entry of external agents.
According to an article by Scientific Reports published in Nature“stratum corneum lipids, such as ceramides, are essential for the permeability function of the skin, as well as other aspects of skin health.”
Over time, ceramide production naturally decreases, which affects the skin’s ability to retain moisture, increasing dryness and promoting premature aging. Furthermore, external factors such as climate, pollution and UV exposure accelerate this loss, weakening the skin barrier and leaving the skin vulnerable.
The skin barrier, rich in ceramides, acts as a primary defense which prevents the entry of bacteria and other microorganisms.
According to Scientific Reportsin skin with xerosis (extreme dryness), the loss of ceramides is correlated with increased transepidermal water loss (TEWL) and a decrease in the cohesiveness of the stratum corneum.
Ceramides help trap moisture in the skin by forming an organized lamellar structure with other lipids such as fatty acids and cholesterol.
According to the study, after applying a lotion rich in ceramides for five weeks, it was observed a 33% increase in the levels of these molecules, noticeably improving skin hydration.
The decrease in ceramides is directly associated with conditions such as eczema and psoriasis. In the case of eczema, an alteration in the proportion of ceramides and a reduction in long lipid chains was documented, which compromises the skin barrier and increases inflammation.
The ceramides restore moisture levels and improve skin elasticityan essential benefit for mature or damaged skin. Studies cited in Nature demonstrate that the use of products enriched with ceramides increases the cohesiveness of the stratum corneum, improving the texture and general appearance of the skin.
Al retain hydration and strengthen the lipid barrierceramides prevent the formation of wrinkles and fine lines, maintaining a youthful appearance for longer. According to the article, increased ceramides in the stratum corneum are associated with firmer skin that is less prone to damage.
Thanks to their ability to restore the skin barrier, ceramides They calm irritations and reduce inflammation. This effect is particularly beneficial for sensitive skin or skin subject to extreme climatic changes.
Ceramides are present in a wide variety of cosmetics, such as moisturizers, serums, and facial cleansers. Complementary ingredients such as hyaluronic acid and niacinamide They enhance its effectiveness by providing additional hydration and reducing inflammation.
For dry and sensitive skin, products rich in ceramides are essential to reinforce the skin barrier. Studies in Scientific Reports highlight that lotions with ceramides significantly improve hydration levels in just five weeks, restoring skin health in patients with xerosis.
The article also highlights that the topical application of ceramides not only improves the skin barrier, but also promotes a healthier microbiome. In particular, an increase in beneficial bacteria such as Staphylococcus epidermidisknown for its ability to protect the skin against infections.
Ceramides can be obtained through foods such as brown rice, wheat, soy and sweet potato. These sources promote the natural production of lipids in the skin, contributing to a stronger skin barrier.
In cosmetics, synthetic ceramides imitate the structure of natural ceramides, providing an effective alternative to restore barrier function.
In addition, there are supplements that help increase internal levels of ceramides, improving the hydration and elasticity of the skin from within.
