A common way of assessing a cosmetic ingredient is to explore what it mixes with and for many, that starts with whether the ingredient is oil or water soluble. The fact that salt is both readily soluble in water and insoluble in oil is used to our advantage when making salt scrubs, allowing us to harness their exfoliant properties in a spreadable emollient base. The aesthetic of a salt scrub can vary from dry and granular, viscous paste-like solids through to those with a flowable oily top layer blanketing a crystalline salty bottom. Unlike in many cosmetic formulations, scrubs which lack homogeneity and that form these layers are not damaged or broken or less attractive to the public. Indeed, salt scrubs are enduringly popular in all their guises, thanks to their simplicity, wholesomeness and the way they leave your skin feeling.