The shampoo bar, like its liquid equivalent, aims to clean the hair and the scalp. With the difference that it does not appear in a bottle but rather looks like a bar of soap. We find all the shapes and colors. Another difference with liquid shampoo: the composition is much healthier. The vast majority of brands that offer shampoo bar work with natural ingredients. At this point, you are certainly intrigued. Wash your hair with soap? To do what? And how does it work? Let’s take stock of the benefits of the shampoo bar and how to use it.