I use SFIC Goats Milk Base (Coconut Oil, Palm Oil, Safflower Oil, Glycerin, Goat’s Milk, Water, Sodium Hydroxide, Sorbitol, Propylene Glycol, Sorbitan oleate, Oat Protein, Titanium Dioxide)
Its about as 'natural' as I can find, and I like the soap properties more than other brands I have tried