People Are Ditching Shampoo For Cola – But Here’s What It Really Does To Your Hair

Although early users of shampoo advocated for a “less is more” approach to washing hair, during the 1970s ads started to encourage us to wash it more often. And some brands wanted us to use their products several times a week. Of course, nowadays it’s not unheard of for some people to lather up their locks every single day.