They don’t eat animal cellular material, or anything that you need to kill an animal for. That includes fat cells and blood cells, but does not include a secreted matrix like milk or honey.
(western) vegetarians are usually OK with things that animals are killed for, as long as no parts of the dead body remain in the food. i think the idea is that “technically, it could be possible to make this without killing anyone, therefore it counts as not killing anyone” which is why lard is out but butter is OK.
i wonder if you could convince a vegetarian to eat a Maasai-like diet of blood and milk, since blood, just like milk, technically can be extracted without killing, therefore making all blood vegetarian.
(western) vegetarians are usually OK with things that animals are killed for, as long as no parts of the dead body remain in the food. i think the idea is that “technically, it could be possible to make this without killing anyone, therefore it counts as not killing anyone” which is why lard is out but butter is OK.
i wonder if you could convince a vegetarian to eat a Maasai-like diet of blood and milk, since blood, just like milk, technically can be extracted without killing, therefore making all blood vegetarian.
I was actually thinking about that specific case of blood as food too, that’s why I ended up saying “cells” rather than “tissues”.