What pH Means, and the Effect of Cleanser pH on Skin

pH meaning, and the effect of cleanser pH on skin

When using products that come into contact with the skin, you may have often heard the term “mildly acidic.”

A mildly acidic product means it has a low acidity level (pH), but is not a very strong acid, and it refers to a condition that helps manage the skin’s moisture balance.

So, shall we take a look at what pH means and how cleanser pH affects the skin?

pH meaning

pH is a unit that indicates the concentration of hydrogen ions, and it is an index that tells whether a solution is acidic, neutral, or alkaline.

pH 7 means neutral, pH 0–6 is acidic, and pH 8–14 is alkaline (basic).

In other words, the lower the number, the stronger the acidity, and the higher the number, the stronger the basicity.

What is the normal pH of skin?

Normal, healthy skin maintains a mildly acidic state, meaning pH 4.5–5.5.

This mildly acidic environment can be important because it plays a key role in maintaining the skin’s natural protective barrier, called the hydrolipid film (or acid mantle).

This barrier protects the skin from external irritants, suppresses the growth of harmful bacteria, and helps prevent moisture loss.

How cleanser pH affects the skin

The pH of a cleanser directly affects the condition of the skin.

Strongly alkaline cleansers (pH 8 or higher) have strong cleansing power, but they can damage the skin’s protective barrier,

so you should be careful because your skin may feel tight, become dry, or become more sensitive.

On the other hand, a mildly acidic cleanser similar to the skin’s pH may help maintain the skin’s protective barrier relatively well after cleansing.

This can vary depending on each person’s skin condition.

Why use a mildly acidic cleanser

A mildly acidic cleanser provides the cleansing power you need while respecting the skin’s natural pH balance.

In particular, for sensitive, dry, or troubled skin,

being able to cleanse with less irritation can be helpful.

Of course, this does not mean that a mildly acidic cleanser is necessarily better for everyone.

Skin type, usage environment, and individual skin reactions should all be considered comprehensively.

Things to consider when choosing a cleanser Check whether it is a product with a pH similar to the skin, around pH 4.5–6.0.

Check whether it contains ingredients that may irritate the skin.

Common things to consider include fragrance, colorants, and alcohol.

Also, I recommend choosing based on your skin type and condition, such as breakouts, dryness, or sensitivity.

If your skin feels severely tight or looks red after cleansing, you may want to consider changing products.

pH is one factor that can help care for the skin.

In particular, since cleanser pH is directly related to maintaining the skin barrier,

it can have an effect, so when choosing a product, it is important to find one that suits your skin.

If you have a specific skin concern or symptom, you may also choose a product suited to you after receiving a professional diagnosis.

Thank you.

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