pH of skin
The pH of the skin is the acid and alkali content. It is on the acid-base balance that the correct cell division, the work of enzymes, the production of hormones, the exchange of energy, protection from pathogenic flora, and the rate of renewal of the stratum corneum of the skin depend. With strong acidification or alkalization, cells die, therefore it is very important to maintain the acid-base balance of the facial skin.
The normal pH of the facial skin should be 5.5 - it is with this indicator that the epidermis is able to resist external factors and maintain skin health. Oily skin has a pH in the range of 4.0 to 5.2, normal skin has a pH of 5.2 to 5.7, and dry skin has a pH range of 5.7 to 7.0.
There are many factors that affect the pH level of the skin, from our diet to the usual washing with water. Soaps, lotions, cleansers, and other skin care products also affect your skin's pH level.
Regular soap has a pH of 9 to 10 and often gives a clear skin feeling. But this is a false feeling: regular soap breaks the hydro-lipid barrier of your skin and makes the pH level too alkaline. Alkali washes away the lipid layer from the skin, and hence acidity. The skin becomes drier, tighter and prone to inflammation. Or vice versa - it can lead to more active work of the sebaceous glands, because the skin tries to compensate for dryness, thereby causing clogged pores and rashes. When the skin is too dry and flaky, it can lead to premature aging and wrinkles.
Facial cleansers have a lower pH than regular soaps and are softer on the skin.
Professional cleansers effectively remove impurities, regulate sebum secretion, deeply cleanse pores, do not dry the skin and strengthen its barrier functions.