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What is skin pH and what does it do?


The pH of the skin reminds us for some of the lessons of physics and chemistry, for the best its definition and its usefulness are still in mind... for the others, here is a reminder accompanied by skincare advice.

Know your skin better

The pH — hydrogen potential — is the measure of the acidity of a solution or an element. Calculated from 0 to 14, we speak of neutral pH when it is at 7. Below, the pH is considered acidic, above it is said to be alkaline or basic.

It turns out that our skin, made up of approximately 70% water , has a pH that must be respected. On average, the pH of our skin is naturally between 4.7 and 5.5 . This acidity allows us protection from external attacks such as extreme climatic conditions (hot and cold), pollution or even UV. This measurement changes according to the different areas of our body and face as well as our age.

Beyond its chemical significance, pH is simply the factor necessary for the skin to produce a homogeneous mixture of lipids and water. Because water and sebum only mix on the skin when its natural pH called "weakly acidic" is respected.

It is this good regulation of sebum and hydration of our skin that will nourish and preserve our hydrolipidic film , the most important layer of our epidermis.

What products to use to preserve its natural pH?

To respect the natural pH of our skin and its balance, it is therefore essential to select natural and organic cosmetic products whose pH is close to or equal to that of our skin.

This is the case first of all with our Phyt'acid cleanser from the Swiss PHYTO 5 range , which allows deep cleansing of the skin while maintaining its natural pH and preserving the hydrolipidic film.

Then opt for an emulsion composed of oil and water brought to the same pH as the skin with our Acid cream from the same Swiss PHYTO 5 range . The presence of fat and water mixed in the form of a cream brought to a slightly acid pH allows the immediate restoration of the hydrolipidic film. The latter being itself composed of sebum (lipids) and water, the use of an acid cream will naturally accompany its restoration.


Nota bene, let's not forget to protect ourselves from UV and cold , which are common disturbances of the natural pH of the skin. Also beware of hormones and solutions (care and/or make-up) that are too aggressive for the skin, which are also responsible for skin disturbances.

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