A hair porosity test is the key to creating healthy hair in the long term.

Here’s what to know about the $0 at-home hair hack.

Have you ever heard the sound of hairliterallyfrying?

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Take it from me, its not pleasant.

Rather, my personal mishap involveslong-term damage to my hairthat Im still trying to mend years later.

What is hair porosity?

An unrecognizable male hairdresser combs the dried hair of middle aged blond woman sitting sideways

Hairstylist at Chicago’s Maxine Salon

Hair porosity refers to the state or condition of the hairs outer layer called the cuticle, says Hardges.

It determines the hairs ability to accept and hold onto a foreign substance.

Think of the cuticle like a snake or fish scale.

Various scattered hairdresser’s tool on blue, including user-friendly hair tools

Low porosity hair is typically wavy to straight, feels heavy and dense, and takes forever to dry.

High porosity hair is typically wavy to coily or kinky.

Why should you test your hairs porosity?

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If the hair remains suspended in the middle, you have medium porosity hair.

Product selection for medium porosity hair can take a little more trial and error, notes Hardges.

Hair that sinks to the bottom means its highly porous.

BEVERLY HILLS, CALIFORNIA - MARCH 02: Shay Mitchell attends the 2025 Vanity Fair Oscar Party Hosted By Radhika Jones at Wallis Annenberg Center for the Performing Arts on March 02, 2025 in Beverly Hills, California. (Photo by Daniele Venturelli/Getty Images)

Hairstylist at Chicago’s Maxine Salon

Minimize how often you shampoo and stick to butters, creams, deep conditioners, masks, and treatments.

We likeBriogeo Dont Despair, Repair!

Deep Conditioning Hair Mask($36).

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Young women wearing swimwear, showering together at outdoor shower while talking about how often should you wash your hair