The pH of Your Skincare Matters More Than You Think

Why pH Matters in Skincare

pH isn't just a chemistry term — it determines whether your skincare products work, irritate, or do nothing at all. Understanding pH can transform your routine. Here's what you need to know.

What Is pH?

pH measures acidity or alkalinity on a scale of 0-14. 7 is neutral. Below 7 is acidic, above 7 is alkaline. Your skin's natural pH is around 5.5 — slightly acidic. This 'acid mantle' protects against bacteria and moisture loss.

Why a Slightly Acidic pH Matters

When you use products with a pH that's too high (alkaline), you disrupt the acid mantle. This leads to dryness, irritation, and breakouts. Traditional bar soap has a pH of 9-10 — terrible for your face. That tight, squeaky-clean feeling? That's your barrier being stripped.

The Ideal pH Ranges

Cleansers: pH 5.0-6.5 (like Marine Therapy Facial Wash). Toners: pH 4.5-5.5. Exfoliating acids (AHA/BHA): pH 3.5-4.0 (low enough to exfoliate, not so low it burns). Vitamin C serums: pH 3.0-3.5 (L-ascorbic acid needs low pH to work). Moisturizers: pH 5.0-6.0.

How to Check

You can buy pH test strips inexpensively. Test a small amount of product on a strip. If your cleanser reads above 7, it's too alkaline — switch to a pH-balanced option. Marine Therapy Facial Wash is formulated at pH 5.5 to respect your skin's natural barrier.

The Golden Rule

If your skin feels tight, dry, or irritated after cleansing, your product's pH is likely too high. Skincare should leave your skin feeling comfortable — never squeaky. Choose pH-balanced products, and your barrier will thank you.