For what purpose? Shampoo is for ungreasing hair. A great alternative is water. Any soap is for bonding with fats. You could start washing your hair with shampoo less often, like once every month or so. But imo it's fine with not washing with shampoo at all. Just water. I have to say, I do not have a job where my hair gets dirty. I wouldn't recommend stop using shampoo when you work in a coal mine or as a firefighter for example. Also, I do wash it with shampoo after I swam in open water or a swimming pool for example. Washing away chlorine and bacteria.