You Can’t Tell From Reviews Alone: Why “pH” Is One of the First Things to Consider When Choosing a Facial Cleanser

How do you usually choose a facial cleanser?

A new launch, a favourite brand, or something with great reviews — everyone has their own way of deciding.

But from the perspective of someone who has worked in cleanser research and development, it’s clear that finding a product that truly suits your skin isn’t always as simple as it sounds.

In reality, even highly rated products can sometimes leave people feeling tightness, dryness, or general discomfort.

I’ve had the same experience myself — choosing carefully based on ingredients and reputation, only to discover that for some reason it just didn’t work for my skin. And because cleanser is something we use every day, not knowing why can be frustrating.

That’s why this time I’d like to introduce one of the key things worth checking early on when choosing a facial cleanser: its pH.

What Is pH? A Key Indicator When Choosing a Facial Cleanser

pH tells us how acidic, neutral, or alkaline a water-based product is, on a scale from 0 to 14. Lower numbers mean more acidic, while higher numbers mean more alkaline.

Healthy Skin Is Weakly Acidic: pH in Dermatology

In dermatology, it’s well known that the surface of healthy skin is usually slightly acidic — what scientists call weakly acidic.

Because of this, a cleanser’s pH may sometimes be linked to:

• how your skin feels after washing (for example, refreshed or comfortable)
• how the skin barrier is affected
• one of the factors involved in keeping moisture in the skin

For a deeper explanation, please see this article.

The pH Range of Facial Cleansers: From Weakly Acidic to Weakly Alkaline

Facial cleansers come in a wide range of pH values, from weakly acidic to weakly alkaline. Paying attention to pH can help you get a rough idea of a product’s general character.

• Weakly acidic cleansers → Often designed to be closer to the natural pH of healthy skin and to feel gentler during use.
• Weakly alkaline cleansers → Often designed to remove oil and dirt more thoroughly.

These are only broad trends, though.

How a cleanser actually performs on your skin depends on the whole formula — the cleansing agents used, their amounts and balance, how long the product stays on your skin, and many other factors. pH is just one piece of the puzzle.

With this in mind, this site brings together pH information for many facial cleansers, drawing on experience from research and development where pH has long been treated as an important technical parameter.

Because pH isn’t always listed on packaging or official websites, this resource can be helpful if you’re wondering:

“What is the pH of the cleanser I’m using now?”
“How acidic or alkaline is the one I’m thinking of buying?”

By checking the data, you may find useful clues for:

• narrowing down cleansers that feel right for your skin
• spotting patterns among products that haven’t suited you before

What Else Matters When Choosing a Facial Cleanser

Finally, remember that pH isn’t the only thing that matters when choosing a cleanser.

Your results will also depend on:

• your current skin condition
• the ingredients and how they’re balanced
• safety considerations
• cleansing strength
• how you use the product

Conclusion: pH as the First Step in Choosing a Facial Cleanser

In future posts on this site, we’ll look at other helpful indicators for choosing cleansers, step by step.

For now, try adding pH to your checklist when comparing products.

We hope this guide helps you feel more confident about finding a cleanser that works for you.