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Hair Porosity Explained: Why Your Hair Absorbs Nothing

If your hair: feels dry even after conditioning gets frizzy immediately absorbs oil too fast—or not at all stays wet forever never seems hydrated …the problem may not be your products. It may be your hair porosity. In the Grit & Glow Lab, we see porosity as one of the most overlooked reasons people struggle with dryness, breakage, buildup, and “unmanageable” hair. Because healthy hair isn’t only about what you apply. It’s about whether your strands can actually absorb and retain moisture properly. This guide explains what hair porosity means, how to identify your porosity type, and how to build a smarter hair routine that actually works for your hair structure. What Is Hair Porosity? Hair porosity refers to your hair’s ability to absorb and retain moisture. Your hair strand is protected by a cuticle layer made of overlapping scales. When the cuticle is: tightly closed → moisture struggles to enter balanced → hydration stays stable raised or damaged → moisture escapes too quickly 👉...

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