For years, I abused my hair — constant heat, harsh styling, no protection. My way was dry, broken and so unhealthy. I’ve since done the research (literally read the scientific papers) so you don’t have to. . Here’s what the science says about the healthiest way to dry your hair: . Both water and heat damage hair. So what’s the lesser evil — air drying or blow drying? . Turns out, the best way to dry your hair is: . Blow-dry on a low heat setting. . Keep the dryer about 15cm away from your head.