Information

Explore Conditions Library

Explore conditions by category. From scalp & hair concerns to skin issues. Select any topic to discover causes, symptoms, and community insights.

Search

Hair condition

Porosity & Absorption

Hair porosity refers to the hair's ability to absorb and retain moisture. Low porosity hair resists moisture entry; high porosity hair absorbs quickly but loses moisture just as fast. Porosity determines how products perform on the hair.

Overview

Hair porosity refers to the hair's ability to absorb and retain moisture. Low porosity hair resists moisture entry; high porosity hair absorbs quickly but loses moisture just as fast. Porosity determines how products perform on the hair.

Common symptoms across conditions

  • Products sitting on top of hair without absorbing
  • Hair that takes very long to dry (low porosity)
  • Hair that dries very quickly and feels rough (high porosity)
  • Inconsistent product results

Ready to find what works?

Start with your condition and see products ranked by real user outcomes.