Here’s a fun fact you might not expect: the water itself could be the problem. If you live in an area with hard water (full of minerals like calcium and magnesium), it coats your hair like a film. That film prevents moisture from getting in, leaving it feeling stiff and sad. It’s like wrapping your hair in cling wrap and then wondering why it can’t breathe.
You can test for this yourself. Does your hair feel squeaky clean after shampooing? That “squeak” isn’t good—it means the cuticles are rough and scraping together. Squeaky = thirsty.
Okay, But Is It Cool?
Actually, yes. The science of dry hair is a physics and chemistry lesson happening on a microscopic level. Hair is made of a protein called keratin, held together by hydrogen bonds. Water sneaks between these bonds and makes hair flexible. When you lose that water, the bonds lock up tight, making hair stiff. That’s why humid days make frizz (more water) and dry days make straw (less water).
It’s also why your hair behaves differently in different climates. You’re basically walking around with a personal humidity sensor on your head. Kind of amazing, right?
Why Is My Hair So Dry? 16 Causes And 16 Treatments – Cosmetic World
