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'''Acid mantle''' is a thin, slightly acidic film on the surface of human skin that acts as a barrier to bacteria, viruses, and other potential contaminants that might penetrate the skin. Composed of sebum (produced by the sebaceous glands) mixed with lactic acid and amino acids from sweat, this mantle plays a crucial role in the health and protection of the skin. The pH of the acid mantle typically ranges from 4.5 to 5.75, creating an environment that supports the skin's natural flora, also known as the microbiome, while inhibiting the growth of pathogenic organisms.

==Composition and Function==
The acid mantle is primarily composed of [[sebum]], which is secreted by the [[sebaceous glands]], and sweat, which contains lactic acid and various amino acids. These components mix on the skin's surface to form the acid mantle. Sebum is rich in lipids, including squalene, wax esters, and triglycerides, which help to keep the skin moisturized and supple. The lactic acid and amino acids from sweat contribute to the acidic pH of the mantle, which is essential for its protective function.

The primary function of the acid mantle is to protect the skin from environmental stressors such as pollutants, harmful microorganisms, and irritants. By maintaining an acidic pH, the acid mantle inhibits the growth of pathogenic bacteria and fungi, which generally prefer a more neutral or alkaline environment. This protective layer also helps to keep the skin hydrated by preventing the excessive evaporation of water, a process known as transepidermal water loss (TEWL).

==Importance in Skin Health==
The integrity of the acid mantle is vital for overall skin health. Disruption of the acid mantle, which can occur due to over-washing, the use of harsh soaps or skincare products, and environmental factors, can lead to a range of skin problems. These include dryness, irritation, increased sensitivity, and susceptibility to infections. Conditions such as [[eczema]], [[dermatitis]], and [[acne]] are often associated with disturbances in the skin's acid mantle.

Maintaining the health of the acid mantle involves using gentle, pH-balanced skincare products, avoiding excessive washing, and protecting the skin from environmental stressors. Hydration and nutrition also play critical roles in supporting the skin's barrier function.

==pH and Skin Care==
The concept of pH balance in skincare has gained attention, emphasizing the importance of using products that respect the skin's natural acidity. Skincare products that are too alkaline can strip the skin of its natural oils, leading to dryness and irritation. Conversely, products that are appropriately formulated to match the skin's pH can support the health of the acid mantle and, by extension, the overall health of the skin.

==See Also==
* [[Skin flora]]
* [[Sebaceous gland]]
* [[Dermatology]]
* [[Skin care]]

[[Category:Dermatology]]
[[Category:Skin care]]
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Acid mantle - Revision history

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