True Castile is only made with olive oil--It doesn't get any simpler~saponified pure olive oil and distilled water!  That's it!  Don't even need an ingredients section!  Fantastic for sensitive skin, allergy prone skin, rash, eczema, baby's skin.  Cleansing, gentle type of soap that has been around for a very long time!  Hard, long lasting bar works up to a gentle creamy lather. Bars are consistently 4.25 oz.--very economical, too!