A pH of 5: why it's the key to preventing your cosmetics from damaging your skin

When it comes to facial care, we often talk about active ingredients, textures, or routines. But one factor that is too often underestimated plays a crucial role in the health of your skin: pH .

Understanding the pH of human skin

The pH of human skin naturally ranges between 4.5 and 5.5 , making it a slightly acidic environment. This acidity is essential to protect the skin against external aggressors (pollution, bacteria, chemicals) and to maintain its hydrolipidic film, a vital natural barrier.

Why knowing your skin's pH is crucial

Knowing your skin's pH allows you to choose products compatible with its natural balance. A cosmetic with a pH that is too alkaline (above 7) can destabilize the skin barrier, causing redness, tightness, blemishes, or increased sensitivity.

Conversely, a product formulated with a pH around 5 , close to that of the skin, respects this delicate balance. This is what MONO Skincare offers , with its entire range of products designed at a pH of 5 : from cleanser to toner, including moisturizer.

Facial skin pH: an area to protect

The pH of facial skin is particularly important, as this area is constantly exposed to external aggressors. Using overly harsh or poorly formulated cleansers can quickly disrupt this balance.

MONO products, for example, use solid formulas to be diluted, without aggressive surfactants, which respect this ideal physiological pH to soothe, hydrate and purify without irritating.

pH and skin types: oily, dry, or sensitive

• The pH of oily skin tends to be slightly lower, around 4.5. However, a skincare product that is too acidic can further stimulate sebum production.

• Dry skin often has a higher pH , between 5 and 6, which weakens the skin barrier. This is why it's important to use slightly acidic products that strengthen this protection.

• For sensitive skin, a neutral pH may seem soothing, but it is often too alkaline. A pH of 5 remains the most balanced.

If the pH is ever unbalanced...

The signs are unmistakable: tightness, redness, acne, dehydration, shine... these are all indicators that your skin's pH is unbalanced. In this case, limit harsh exfoliants, adopt a minimalist routine, and choose skincare products with a gentle and stable pH .

A pH of 5, the basis of healthy skin

In cosmetics, everything starts with respecting the skin's natural pH . Choosing gentle, well-formulated skincare products with a pH around 5 guarantees your skin balance, health, and resilience.

MONO Skincare makes this principle a priority, with its 6 essential treatments (cleanser, makeup remover, toner, scrub, night serum, moisturizing lotion) designed to adapt to the pH of the face and all skin types.