Soap is one of the most common gluten-free skin care products available. Gluten-free soap's prevalence makes sense, considering that soap, itself, is the most widely used skin cleansing product in the world. Furthermore, soap is a common commodity, even in the poorest of countries [source: The Global Public-Private Partnership for Handwashing with Soap].
Gluten-free soaps are great for anyone who experiences general gluten intolerance or allergies to products containing the protein. Also, like most gluten-free skin cleansing products, gluten-free soaps are often made from all-natural ingredients, so they're perfect for people with sensitive skin or anyone looking to reduce their consumption of artificial chemicals (which many mass-produced soaps are full of). Many all-natural and organic soaps are also gluten-free.