Low porosity hair has a tightly sealed cuticle, making it resistant to absorbing water and treatments. Use heat to open the ...

Ever slathered your hair in expensive oil only to end up with a greasy mess that somehow still feels dry? You’re not alone. The culprit might not be the product itself but a mismatch with your hair’s ...

Your hair’s relationship with moisture affects everything from product selection to styling success. Hair porosity, or how well your strands absorb and retain moisture, can explain why some products ...