The soap in the photo [linked] looks exactly like what I recently got from eBeeHoney. The ingredients are listed on each bar, [Lavender Oatmeal]: saponified vegetable oils [olive, rice bran, coconut, organic palm & shea butter], goat milk, natural essential oil, [Moot says this is good oil, lol], oatmeal, natural vitamin E.
I had to look up saponified, it's basically lye, which is used to make hominy and lutefisk [both of which some people eat, though I am not one of them], so I don't think it poses much risk in a bar of soap.
My feeling is if you're buying something 'homemade', it's caveat emptor [buyer beware] all the way.