
Beauty

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Published 15:30 13 Sept 2019 BST
Updated 15:44 13 Sept 2019 BST

"Naturally drying hair swells the cortex, as it is in contact with water for a longer period. "Repeated swelling and slow drying of hair causes the cell membrane complex (the glue that holds the cuticle together) to crack, which damages the hair."But it's not all good news if you're a fan of blitzing your locks with the hair dryer. Basically, using a hair dryer does cause more surface damage - like roughness, dehydration and the loss of hair colour - to your hair. But using the dryer 15 cm away from your hair, and in a continuous movement, ends up causing less damage than if you dry your hair naturally.