Add Yahoo as a preferred source to see more of our stories on Google. For several years now, there has been this hot topic and theory of “training” your hair, an idea that you can control the amount ...

If you want to incite some drama at a dinner party, ask people how often they wash their hair. Okay, maybe don't do that if it feels intrusive. But among the people I know I can tell you, everyone ...

“Hair training” entails progressively increasing the time between each wash of your hair. TikTokers have asserted that doing so will leave you with a fuller and shinier head of hair (Photo: Getty) ...