Some brands also add in coconut, jojoba, hemp, or other vegetable oils, in addition to sodium hydroxide.
So, what makes castile soap different from other types of store-bought soap? For one: It’s vegan. (Traditional soaps are sometimes made with animal oils and fats or artificial detergents, instead of vegetable oils.) Castile soap is also extra concentrated — meaning you only have to use a little bit each time you clean, and each bottle should last you a while.
Castile soap is also extremely multi-functional. Here’s how to make your own, and here’s how to use it on just about everything: