Castile soap is a type of soap like Keys® Island Rx, Island Rx Foaming Wash, Windsurfer, and MetaClean originated from the Castile region of Spain. It is traditionally made from olive oil and is known for its mildness and versatility. The higher alkalinity of Castile soap have benefits for the skin and face, but it’s essential to use it properly and cautiously. Most Castile soaps border on harsh, meaning their pH is higher than we recommend. When Keys® makes our version of Castile, we blend olive, coconut, avocado, and Jojoba oil to more fully saponify…