The hydrolipidic film is a thin , invisible film that covers the surface of our skin, playing a crucial role in protecting and moisturizing it. Located on the surface of the stratum corneum , this natural barrier is composed of sebum (oil phase) and sweat ( aqueous phase ), produced by the sebaceous glands and sweat glands respectively. Here is a detailed look at its functions, its importance, and how it can be affected by various factors.
Composition and functioning of the hydrolipidic film
The skin is made up of several layers, with the stratum corneum being the outermost. The hydrolipidic film is located on the surface of this layer, forming a protective barrier. It is made up of two main phases:
- The oily phase : This phase is mainly composed of sebum, a fatty substance produced by the sebaceous glands. Sebum gives the hydrolipidic film its moisturizing and lubricating properties, preventing the skin from drying out.
- The aqueous phase : This phase is composed of sweat, produced by the sweat glands, as well as water-soluble components such as amino acids. This phase helps maintain skin hydration and contributes to a slightly acidic pH (around 5.5), which is essential to protect against pathogenic microorganisms.
Main functions of the hydrolipidic film
1. Protection against external aggressions
The hydrolipidic film forms a barrier that protects the skin against environmental aggressions such as pollution, bacteria, viruses, and fungi. The slightly acidic pH of the skin (around 5.5), maintained by this film, inhibits the growth of many pathogenic microorganisms, thus helping to prevent skin infections.
2. Skin hydration
One of the essential functions of the hydrolipidic film is to prevent excessive water loss from the skin by forming an occlusive layer. This layer limits the evaporation of water on the surface of the skin, thus maintaining its hydration, softness and suppleness.
3. Regulation of sebum and sweat
The hydrolipidic film helps regulate the production of sebum by the sebaceous glands and the production of sweat by the sweat glands. This regulation is important to maintain an optimal balance of hydration and protection of the skin according to environmental and physiological needs.
4. Maintaining microbiological balance
By maintaining an acidic pH and providing a stable environment, the hydrolipidic film helps balance the skin's natural microbial flora. This balance is crucial for protection against pathogens and for preventing skin problems such as infections and inflammation.
5. Support for skin barrier function
The hydrolipidic film works in synergy with the stratum corneum, the outermost layer of the epidermis, composed of dead cells and lipids. Together, they form an effective physical and chemical barrier that protects against external aggressions and helps retain moisture inside the skin.
6. Prevention of irritations
By forming a protective layer, the hydrolipidic film helps reduce the skin's sensitivity to external irritants such as chemicals, detergents, and extreme weather conditions. This helps prevent irritation and allergic reactions.
7. Skin lubrication
The oily phase of the hydrolipidic film, mainly composed of sebum, provides natural lubrication that prevents the skin from becoming dry and rough. This lubrication is essential to maintain a smooth and pleasant texture of the skin.
Factors affecting the hydrolipidic film
The hydrolipidic film can be compromised by various factors, leading to skin problems:
- Improper care : Using inappropriate care products, such as harsh cleansers or exfoliators too frequently, can disrupt the hydrolipidic film, leading to dry, irritated skin that is more prone to infections.
- Age : As we age, sebum production decreases, making skin drier and less able to retain moisture.
- Deficient diet : A diet poor in essential nutrients, such as omega-3 fatty acids, can affect the quality and quantity of sebum produced, thereby compromising the hydrolipidic film.
- Environmental conditions : Extreme climatic conditions, such as intense cold or excessive heat, can alter the composition and integrity of the hydrolipidic film.
How to maintain a healthy hydrolipidic film
For the hydrolipidic film to do its job properly, it is important to follow an appropriate beauty routine :
- Use gentle cleansers : Choose cleansers that respect the skin's natural pH and do not dry it out. Cleansers with probiotics are ideal.
- Moisturize regularly : Apply moisturizers that contain nourishing ingredients, such as essential fatty acids and ceramides, to strengthen the skin barrier.
- Protect the skin : Use sunscreen products to prevent UV damage, which can degrade the hydrolipidic film.
- Eat a balanced diet : Consume foods rich in essential skin nutrients, such as vitamins, minerals, and omega-3 fatty acids, to support sebum production and overall skin health.
The interest of biomimetic and adaptive cosmetics for maintaining a healthy hydrolipidic film
Biomimetic cosmetics aim to mimic the skin’s natural biological structures and functions. By using ingredients and formulations that closely resemble compounds naturally present in the skin, our skincare products can better integrate and support skin mechanisms.
Benefits for the hydrolipidic film of VIBRE care products
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Mimicry of natural lipids :
Biomimetic formulations contain lipids similar to those in the skin, such as ceramides, fatty acids and cholesterols. These lipids help restore and strengthen the hydrolipidic barrier, filling the spaces between the cells of the stratum corneum.
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Optimal hydration :
Biomimetic products use natural humectants such as hyaluronic acid and amino acids, which attract and retain water in the skin. This helps maintain hydration and prevent dehydration of the stratum corneum.
- Skin Compatibility :
Since these products mimic the skin's natural components, they are often better tolerated, reducing the risk of irritation and allergic reactions. This compatibility helps maintain the integrity of the hydrolipidic film without disrupting it.