During the Crusades, it was the Knights returning from the east who introduced us to soap, although it wasnt until the outbreak of the Black Plague that soap and water became popular. In the early part of the 19th Century people began to wash their hands, feet and face regularly. That said, washing hair regularly only became popular in the 1950’s. Historically, in medieval times Royals, would have only washed their hair once a month, nobles a few times a year and peasants would have made do with rivers, lakes and ponds. In medieval times soaps were made from animal fats, wood ash and soda. Today there appears to be a soap, shampoo, conditioner, repair rinse for everything, each coming with its own packaging, increasing our need to manage our waste.