By definition, true Castile Soap is made with 100% Olive Oil. It is often imitated by soaps labelled Castile, but which actually contain a blend of several different vegetable oils, among other things.  True Castile soap has a lotion-like lather, and is the gentlest soap you can buy.  The oleic acid in olives produce a superior soap that is incredibly moisturizing and won't clog pores.  It is perfect for people with sensitive skin or allergies, the elderly, and babies.  My handmade Castile Soap is true, traditional, and pure, with no additives, colors, or fragrance. Vegan friendly.