Does your hair absorb all your treatments without ever seeming hydrated? This phenomenon has a name: hair porosity. It's neither a hair type nor a genetic predisposition, but a surface condition—that of the cuticle, the scales that envelop the hair fiber. And a surface condition can be corrected.
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What makes hair porous
On healthy hair, the cuticle is covered with an invisible lipid film that makes it hydrophobic: water slides off instead of penetrating. When this film is depleted, the surface becomes hydrophilic and water enters in large quantities before immediately leaving again.
- Dyes and bleaches degrade this surface film
- The heat from styling tools cracks the hair cuticles.
- Washing with too much alkalinity causes the fiber to swell and lifts the cuticle.
Porosity is often described as a genetic predisposition, when in fact it's a surface condition. Hair isn't born porous; it becomes so through chemical processes, heat, and an unbalanced pH. And what's acquired can be corrected.
Why don't your skincare products last?
A raised cuticle doesn't retain anything. Water and active ingredients penetrate quickly, then evaporate just as quickly once the hair dries. This explains the frustrating feeling of hair becoming dry again within a few hours, regardless of how rich the mask is.
Signs of high porosity
You may be affected if you observe several of these signs:
- Hair feels rough to the touch, even when clean
- Frizz appears as soon as the air becomes humid.
- Very quick drying
- Lengths that tangle on their own
- Dull and brittle tips
Verified review
"Incredible! I didn't really believe it, but it's true: by taking care of the roots, the ends follow. My hair is shiny, nourished, and the application is super easy. Very, very good product."
Chloé B., a customer for 2 years
Discover the solution
The protocol for closing the surface
Good news: porosity is reversed. The goal is to wash at pH 5 to limit fiber swelling, to provide lipids to rebuild the surface film, and to purify the scalp which produces the future centimeters of hair.
Dry & Damaged Hair Protocol
Comprehensive treatment for dry & damaged hair
To remember
- Porosity is not a type of hair, it is a surface condition
- A bare cuticle allows water to enter and leave immediately
- A wash at pH 5 and lipids applied to the lengths seal the surface
- Strong hair is built at the root, even before it emerges
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