High hair porosity: what it is and how to care for it.
High porosity hair is one of the most important profiles to recognize in professional haircare because it directly impacts hydration, color longevity, and breakage risk. When the cuticle is raised or uneven, moisture enters the strand quickly but escapes just as fast, leaving the hair dry, fragile, and difficult to manage. When it comes to how to fix high porosity hair, the goal is not only hydration but also retention, helping the fiber keep moisture, lipids, and repair actives inside the cortex. With the right hair rescue routine, highly porous strands can recover softness, shine, and resilience.
6 min read
L'Oréal Professionnel Team
08/09/2026