Maintaining a Healthy Skin Barrier

The skin serves numerous functions – detoxifying, protecting, regulating – but the primary protective or barrier function is the most obvious. The top layer of skin cells has the most important function in maintaining the effectiveness of the barrier. Here the individual cells overlie each other and are tightly packed, preventing bacteria from entering and maintaining the water-holding properties of the skin.
Fatty substances (lipids) are secreted by the cells during the course of their journey from the base layer of the skin to the top. These lipid molecules join up and form a tough connecting network, in effect acting as the mortar between the bricks of a wall.

The cell wall barriers are simply layers of fats that surround the watery contents. Therefore, the communication mechanisms must operate through these fatty cell walls. In fact, many of the substances that are involved in this communication process are various fats since it is easiest for fats to move within the fatty layers that comprise the cell walls. Despite its bad reputation, proper fats and cellular fats are of major importance in our body’s biochemistry and physiology.

Damage to the skin barrier can result from a combination of genetic predisposion and exposure to sensitizing chemicals and other substances. That is why avoiding irritants is as important as using products that help. In skin care, the most common irritants are usually perfumes and preservatives.

Fatty substances control the majority of our body’s physiology through receptors that activate many important genes. Likewise, our skin barrier is comprised of a supporting structure of collagen, a protein that contains fats that serve a critical function. These fats prevent the excess loss of water through our skin and prevent the cells of our body from becoming dehydrated and dying.

A major sign of a defective skin is the dryness that results from excessive water loss. This water can not be applied topically but must be ingested. To prevent the excessive water loss and the resulting dry skin, we must repair the skin barrier. We find that the skin composition in individuals with dry skin is due to an improper mixture of the skin fats. This is commonly due to a deficiency in our diet of the correct fats, those contained in natural olive oils, avocados, and healthy nuts, etc. On a nutritional basis, we can provide these necessary fats through the skin sometimes through topical treatments containing natural butters or oils, like Shea, olive and cocoa butter. The epidermis is not a usual means to acquire nutrition but it can absorb enough fatty substances to correct the fat imbalances that are the cause of the defect in the skin’s barrier function and thus correct the dry, itchy skin or sensitive skin problem. Try to be aware of chemical preservatives in any topical products you do use.

Although many products today are labeled “fragrance free,” that is really a misnomer. Nearly all products contain some fragrance to mask their chemical odor; so-called fragrance-free products may just contain fewer chemicals than others. What’s more, the fragrances used in many products (even pricey perfumes) are commonly synthetic. For sensitive individuals, this chemical brew can be a problem To make matters worse, many natural fragrances are now extracted using harsh solvents rather than old-fashioned distillation methods, in which fewer chemicals come into contact with the essential oil of the flower. Unless you can determine the extraction method used, be cautious. This is one reason many individuals react negatively to the essential oils used in aromatherapy massages and related products – many are of a synthetic, chemical composition.

According to several studies, various preservatives including formaldehyde, parabens, and others commonly used in skin, hair, and beauty products can also provoke allergic reactions. Although the preservatives are needed to maintain product shelf life and only minute amounts are present in any given product, many products contain these same chemicals, including skin care products, makeup, medications, antiperspirants, toothpaste, and foods. Many of these products are used on a daily basis, causing a higher reaction rate. As a result, the overall exposure to these harmful ingredients is higher than would occur if only a single product were used. Studies show that massage therapists have more contact dermatitis – or skin inflammation – due to exposure to these extracts.

Until recently, few studies investigated the cumulative impact of repeated exposures to preservatives in a variety of products and ingredients. For the majority of people, these product preservatives are an additional benefit, not a problem. But, as the chemical compositions increase, so do the allergic reactions.
If you suffer from sensitive, allergic skin or severe dry skin, you may be among those who will have a problem or reaction to these chemical-laden products. In this case, it is your role as an informed consumer to carefully read labels for all products that come into contact with your skin – internally or externally- to assure that they don’t contain the listed ingredients that you must avoid. Your skin barrier does a lot to protect you naturally, help it out when you can and feed it nourishing chemical-free products whenever you can.