Hair Porosity, Density & Strand Thickness: Why They Matter
Walk into any beauty store and you'll find products promising moisture, growth, shine, repair, and stronger hair.
The problem is...
None of those products know your hair.
A product that works beautifully for one person can be disappointing for someone else, even if they have a similar curl pattern.
That's because healthy hair isn't just about whether you have straight, wavy, curly, or coily hair.
It's about understanding how your hair behaves.
Before you spend another dollar on products, there are three things you should know about your hair.
1. Hair Porosity
Hair porosity is your hair's ability to absorb and retain moisture.
In other words, it determines how easily water enters your hair and how well your hair holds onto that moisture.
Low Porosity Hair
Low porosity hair has tightly packed cuticles that lie flat against the hair shaft.
Because of this, water and products take longer to absorb and can sometimes feel like they're sitting on top of your hair.
This hair type often responds best to lightweight products and routines that encourage moisture to penetrate the hair rather than coat it.
High Porosity Hair
High porosity hair has a more open cuticle.
Water absorbs quickly...
But it also escapes quickly.
That means high porosity hair often benefits from richer conditioners, heavier creams, and products that help slow moisture loss.
This is why someone with high porosity hair may love a product that leaves someone with low porosity hair feeling greasy, coated, or weighed down.
The product isn't necessarily good or bad.
Their hair simply has different needs.
2. Strand Thickness
Strand thickness refers to the diameter of one individual hair strand.
It isn't the same thing as having a lot of hair.
Your strands can be:
- Fine
- Medium
- Coarse
Fine strands usually feel smooth and are difficult to feel between your fingers.
Coarse strands are thicker, stronger, and much easier to feel.
Knowing your strand thickness helps you choose products that match your hair.
For example, someone with fine strands may find heavy butters and oils overwhelming, while someone with coarse strands may need richer products to keep their hair feeling soft and moisturized.
3. Hair Density
Hair density is simply how much hair you have growing on your scalp.
Think of it as the number of hairs you have, not the size of each strand.
You can have:
- Low density
- Medium density
- High density
Someone with fine strands can still have very high density.
Someone with coarse strands can have low density.
These are two completely different characteristics.
Knowing your density can help you understand everything from styling and product application to why your wash day takes more or less time than someone else's.
Why These Three Things Matter
Imagine two people who both have 3B curls.
One has:
- Low porosity
- Fine strands
- High density
The other has:
- High porosity
- Coarse strands
- Low density
Even though their curl pattern looks similar, their routines shouldn't.
The shampoo they choose.
How often they clarify.
How much conditioner they apply.
The oils they enjoy.
Even how frequently they wash their hair.
Those choices can all be different because their hair behaves differently.
This is why copying someone else's routine doesn't always work.
Your hair isn't their hair.
Where Should You Start?
If you're just beginning your healthy hair journey, start with porosity.
Understanding how your hair absorbs and retains moisture makes it much easier to choose products, build a routine, and troubleshoot problems when they come up.
Once you understand your porosity, strand thickness, and density, you'll stop relying on trial and error and start making decisions based on how your hair actually behaves.
That's the foundation of healthy hair.
Not chasing products.
Understanding your hair first.
Ready to Stop Guessing?
If you're tired of wondering why your hair still feels dry, products sit on top, or your wash routine never seems to work the same twice...
The LUMNCE Method™ was created for you.
Inside, you'll learn how to understand low porosity hair, troubleshoot common wash day problems, and build a routine based on how your hair is behaving.