Do You Have High Or Low Porosity Hair? Here's How To Tell + What To Do
Everything you need to know.
mbg Assistant Beauty Editor
mbg Assistant Beauty Editor
Hannah Frye is the Assistant Beauty Editor at mindbodygreen. She has a B.S. in journalism and a minor in women’s, gender, and queer studies from California Polytechnic State University, San Luis Obispo. Hannah has written across lifestyle sections including health, wellness, sustainability, personal development, and more.
Image by Aaron Thomas / Stocksy April 30, 2023 Our editors have independently chosen the products listed on this page. If you purchase something mentioned in this article, we may There is no shortage of descriptors that we can associate with our hair—each coming with a unique set of benefits, attributes, challenges, and treatment needs. Even if you find two people with fairly similar texture patterns, their hair density, scalp needs, strand thickness and length will add up to very different care and styling routines. Hair porosity is one of those tricky little descriptors that can play a big role in the overall feel and appearance of your hair. In general, you’ll fall into the category of low or high porosity—or, somewhere in between.
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To come, how to tell where you fall and a guide to caring for high porosity hair. What is high porosity hair?
Porosity refers to how susceptible your hair is to water: essentially, to what degree the outer layer of the strand takes in or keeps out water.
"The outer layer of the hair strand is called the cuticle layer. The cuticle layer is made of little tiny cuticles that lie slightly over one another," hairstylist Danielle Malary explains. Think of this as you would a shingles on a roof—and your porosity comes from how tightly those shingles are packed together.
"Hair porosity describes how the hair's cuticle absorbs and holds on to moisture in its pores—hence, the term porosity," says hairstylist Miko Branch, co-founder of hair care brand Miss Jessie's. So when your hair high on the porosity spectrum, it means it's very porous, and thus the cuticles are more sparse than they are dense, so it's able to absorb a lot of water.
In contrast, you can have low porosity hair: "When someone has low porosity hair, the hair tends to have trouble absorbing moisture because the hair is resistant to water," says Malary. "When the hair has low porosity, the cuticles are packed so tightly onto each other, it makes it very difficult for moisture or water to penetrate the strand."
Can hair porosity change?
Even if you had low porosity hair in the past, that porosity can change. “According to the National Center for Biotechnology Information ( NCBI)1, hair that is extremely porous are hair strands that are damaged by things such as UV exposure, hair bleaching, chemical relaxers, or intense heat over long periods of time,” explains certified trichologist and founder of Alodia Isfahan Chambers-Harris.
“Exposure to these things leads to increase in porosity levels causing your hair to have high porosity,” Chambers-Harris adds. So the more you expose your hair to UV, heat, and chemical damage, the more porous it becomes.
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Characteristics of high porosity hair
Still, it can be hard to tell if your strands are highly porous right now. Below, a few signs you may fall into this category:
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How tell if you have high porosity hair:
Still unsure? Call upon one of the following tests.
The classic test to see what your porosity is is called the water test. It's super simple: Grab a glass of water, and a strand of hair (like from your brush). Drop in the hair and see if it floats or sinks to the bottom. If it floats, you have low porosity hair. If it sinks to the bottom, you have high.
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“Take a small section of hair at the crown area, holding onto the ends and slide your thumb and index finger up and down the hair strand towards the scalp. If hair feels rough the porosity level is higher,” certified trichologist and founder of Colour Collective Kerry Yates explains.
If you’re still not sure, it’s best to visit a stylist. These experts can help you identity your hair porosity level and ensure you’re using the best routine for your strands.
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How to care for high porosity hair
High porosity hair is also highly sensitive, so take these care tips seriously.
The best ingredients for high porosity hair
When shopping for high porosity hair products, look for these ingredients:
The best products for high porosity hair
Wash and styling products are often marketed toward your hair type, not necessarily the porosity level of your hair. To narrow down your search, experts explain what type of products you should use below.
Leave ins
You may sense a theme here: Highly porous hair is begging for moisture. To ensure your strands stay soft post-rinse, add a leave-in conditioner to your routine. Look for a rich, creamy formula rather than something light and water-based.
Curl cream
As mentioned above, letting your strands air dry is much preferred. For those with curly strands, have a curl cream (read: not just a curl gel) on hand for shaping that’s both nourishing and functional. If you choose to diffuse your curls, use a heat protectant beforehand.
Hydrating shampoos
Yates notes that all products used on highly porous hair should be hydrating—yes, including your shampoo. Look for a rich formula, preferably one that’s silicone free, Yates adds. One expert pick: Shea Moisture High Porosity Moisture Replenish Shampoo.
Conditioner
Chambers-Harris recommends using deep conditioners (or hair masks) rather than lightweight formulas if you have highly porous strands. This type of product often contains less water and more nutrient-dense butters—perfect for highly absorbent hair.
Repair treatments
“Damaged hair can lose its luster by being porous like scratched glass,” celebrity hairstylist Bradley Leake explains. One way to ensure your hair gets repaired is to use bond-building products like the Epres Bond Repair Treatment weekly.
Best products for high porosity hair
FAQ
What are signs of high porosity hair?
Your hair gets wet quickly
Your hair dries quickly
Your hair tangles easily
Your hair generally feels dry and rough
Your hair is often frizzy
Your hair breaks easily
Your hair doesn’t hold style very long
What is high porosity hair?
"Hair porosity describes how the hair's cuticle absorbs and holds on to moisture in its pores—hence, the term porosity," says hairstylist Miko Branch, co-founder of hair care brand Miss Jessie's. So when your hair high on the porosity spectrum, it means it's very porous, and thus the cuticles are more sparse than they are dense, so it's able to absorb a lot of water.
What should I avoid with high porosity hair?
When caring for high porosity hair, do your best to avoid excessive heat styling, UV exposure, and damaging chemical treatments. Rather than using lightweight leave-in products, opt for nutrient-dense creams and oils—this way, your highly porous strands will soak up all of the ingredients needed to repair any damage.
The takeaway
Highly porous hair gets wet quickly, but dries quickly too. To properly care for your highly porous strands, use dense, nutrient-rich hair care products and limit your exposure to heat and chemical hairdye if you can. Not sure where to start? Get a bond building treatment—here’s a few great options to try.