And the longer you can make your blowout last, the less frequently you’ll need to dry it, which means you’ll have healthier hair root-to-tip. According to SELF, “heat causes damage. Blow-drying causes a “flash drying” effect that not only removes the surface moisture but also removes water that is bound to the hair, which is called water of hydration. The effect of this flash drying is that the cuticles become dry, rigid and brittle. When the hair flexes, the pressure causes the cuticles to crack. Combing hair with this degree of cuticle cracking causes significant breakage.”
