Is a hair dryer bad for your hair?

It’s true that nearly none of us would say no to a salon-quality blowout. But it’s also true that we don’t have the time (or money) to regularly visit our hairstylists for a professional-level ‘do. That’s why most of us keep a blow-dryer on hand at home. With that said, one question often lurks in the back of our minds: Is blow-drying your hair bad?

Constant exposure to high heat is indeed a recipe for hair damage in the making. But that’s not to say blow-drying is entirely bad for your mane, so long as you do it correctly. In fact, science reveals that air-drying may be more damaging than blow-drying. (Surprise, surprise!)

Ahead, we address all of your concerns and answer the question, “Is blow-drying your hair bad?” Keep reading to find out if you should switch from Team Air-Dry to Team Blow-Dry.

So, is blow-drying your hair bad? Not necessarily. Per the earlier 2011 study, heat damage is usually seen on the hair cuticles rather than within the fibers (i.e., the cortex and medulla). You can think of your cuticles as the first line of defense against heat exposure from blow-drying hair. In which case, healthy cuticles mean your mane is less likely to suffer after a bout of blow-drying.

Of course, there’s a limit to the protective powers of your cuticles. One study in the International Journal of Cosmetic Science cautioned that heat settings higher than 284 degrees Fahrenheit cause damage to the cuticles that’s irreversible (think frizzy-looking hair and split ends). At high temperatures of 392 degrees Fahrenheit, expect wholly damaged hair.

That’s because when you blast hot air onto wet hair, small bubbles form inside the shafts. This weakens your mane, making it more prone to dryness and brittleness. In other words, hello frizz, tangles, and breakage.