Premium Nahrungsergänzungsmittel | artgerecht

Skin Barrier – Function, Disorders and Care

The skin barrier is the outermost protective layer of the skin, shielding the body from environmental stressors, pathogens, and moisture loss.

Regular tips about health Regular tips about health

Things worth knowing about "Skin barrier"

The skin barrier is the outermost protective layer of the skin, shielding the body from environmental stressors, pathogens, and moisture loss.

What Is the Skin Barrier?

The skin barrier refers to the functional protective layer of the skin, formed primarily by the epidermis – in particular the stratum corneum (horny layer). It serves as the body's first line of defense against the external environment, protecting against pathogens, UV radiation, chemical substances, and allergens, while simultaneously preventing excessive water loss through the skin.

The skin barrier is not solely a physical structure; it also comprises a chemical and an immunological shield. Together, these layers form a complex system that maintains the integrity and health of the skin.

Structure of the Skin Barrier

The skin barrier can be divided into three key components:

Physical barrier: The stratum corneum consists of dead cornified cells (corneocytes) embedded in a lipid matrix. This structure is often compared to a brick-and-mortar model: corneocytes act as the bricks, while lipids – primarily ceramides, free fatty acids, and cholesterol – form the mortar.
Chemical barrier: The so-called acid mantle – a slightly acidic pH of 4.5 to 5.5 on the skin surface – inhibits the growth of harmful microorganisms.
Immunological barrier: Specialized immune cells in the skin, such as Langerhans cells, recognize and combat invading pathogens and allergens.

Functions of the Skin Barrier

The skin barrier fulfills numerous essential functions:

Protection against pathogens (bacteria, viruses, fungi)
Regulation of transepidermal water loss (TEWL) to maintain skin hydration
Defense against allergens and chemical irritants
Protection against UV radiation via melanocytes in the epidermis
Temperature regulation and sensory perception

Causes of a Compromised Skin Barrier

A damaged or weakened skin barrier can result from various factors:

Genetic factors: Mutations in the filaggrin gene are a common cause of inherited barrier deficiency, as seen in atopic dermatitis (eczema).
Environmental influences: Dry air, extreme temperatures, UV radiation, and pollutants damage the skin barrier.
Chemical irritants: Frequent handwashing, harsh cleansers, detergents, and solvents disrupt the lipid layer.
Skin conditions: Conditions such as psoriasis, eczema, and rosacea are often associated with impaired barrier function.
Aging: With advancing age, the skin produces fewer ceramides, fatty acids, and cholesterol, weakening the barrier function.

Symptoms of a Damaged Skin Barrier

When the skin barrier is compromised, typical signs include:

Dryness and a feeling of tightness in the skin
Redness and irritation
Itching (pruritus)
Flaking and cracked skin
Increased sensitivity to skincare products and environmental triggers
More frequent skin infections

Diagnosis

Assessment of skin barrier function in dermatology is performed using several methods:

TEWL measurement: A tewameter is used to measure transepidermal water loss, which provides information about the quality of barrier function.
Skin surface pH measurement: An elevated skin pH is indicative of a compromised barrier.
Clinical evaluation: Skin examination, patient history, and, if applicable, allergy testing help diagnose underlying conditions.

Treatment and Care of the Skin Barrier

Restoring and maintaining a healthy skin barrier is central to many dermatological therapies:

Topical Emollients and Moisturizing Care

Regular application of emollients (nourishing creams and ointments) is the foundation of barrier care. Products containing ceramides, hyaluronic acid, glycerin, and niacinamide support the regeneration of the lipid layer.

Pharmacological Therapy

For inflammatory skin conditions with impaired barrier function, topical corticosteroids, calcineurin inhibitors (e.g., tacrolimus), or modern biologics (e.g., dupilumab for atopic dermatitis) may be used.

General Behavioral Recommendations

Use skin-neutral or mildly acidic cleansing products
Avoid hot water when washing
Reduce direct sun exposure and use adequate sun protection
Identify and avoid triggers (allergens, irritants)
Maintain adequate hydration and a nutrient-rich diet

References

Proksch E, Brandner JM, Jensen JM. The skin: an indispensable barrier. Experimental Dermatology. 2008;17(12):1063-1072.
Elias PM. Stratum corneum defensive functions: an integrated view. Journal of Investigative Dermatology. 2005;125(2):183-200.
Schmid-Wendtner MH, Korting HC. The pH of the skin surface and its impact on the barrier function. Skin Pharmacology and Physiology. 2006;19(6):296-302.

Building Blocks for a Healthy Life

As an integrated manufacturer, we develop & produce evidence-based, patented, and non-patented formulations. We work exclusively with plant and natural extracts according to the strictest purity & quality standards.
The combination of science & modern technology with the laws of nature creates solutions consistently tailored to humans – for the highest good: health.

Most read entries

3 Posts in this encyclopedia category

Pionier in Lactoferrin & naturbasierten Nutraceuticals seit 2016

130k Empfänger: Werde Teil der Community!

Wissenschaftliche Beiträge, Ernährungs- & Gesundheitstipps, sowie Zugang zu exklusiven Angeboten. Melde Dich an & sichere Dir 10% Nachlass auf Deinen nächsten Einkauf.