It says "true" for any ingredient it doesn't have in its list (I tried lamb, goats milk, and sausage – all are reported to be vegan).<p>It would make more sense to just release the JSON list of known non-vegan ingredients. People can use Array#filter and Array#some themselves.<p>EDIT: it says these are all vegan too: steak, bacon, ham, pheasant, venison, cheddar, mozzarella, ghee, lactic acid, sour cream.