This diagram shows the pH scale and how it affects your skin. The left side (A) represents healthy acidic pH (4.5–5.5) where your skin's protective barrier thrives. This formula is pH 4.8–5, sitting in the healthy acidic zone to support your skin barrier. The right side shows higher pH levels that can disrupt your skin's natural defenses.

Your skin naturally maintains a slightly acidic pH, typically between 4.5 and 5.5. This delicate "acid mantle" is a vital part of your skin's protective barrier, defending against moisture loss, environmental damage, and unwelcome microbes. Research published in the Journal of Investigative Dermatology (2025) confirms that maintaining skin's acidic pH is crucial for barrier integrity, microbiome regulation, and preventing dermatological conditions.

Many products, especially cleansers, are formulated at a pH of 6 or higher. While your skin can temporarily recalibrate, repeated use of products outside its optimal range can progressively weaken the acid mantle. This can lead to increased dryness, sensitivity, and a compromised skin barrier over time.

Matilda Jane products are all formulated with the skin barrier in mind—function-first ingredients. After all, our skin barrier is our first line of defense. When that is damaged or broken, you'll see dry, cracked skin, breakouts, hormonal bumps, sensitivity, redness, and increased irritation. Studies in Cells (2023) demonstrate that pH-compatible products support the skin's protective barrier and prevent irritation. Bottom line: the pH of products plays a vital role in supporting and protecting your skin barrier.

pH can be personalized. For me, a slightly more acidic pH reset my skin barrier, clearing 80% of hormonal jawline bumps at a fraction of the cost and without unnecessary ingredients.