ichabod
Legned
As long as it's not a spell caster, sure.All nonmagical food
As long as it's not a spell caster, sure.All nonmagical food
If you're a Yuan-Ti.
So, this is what I meant by an interesting ontological problem. Basically, whether or not this works, according to RAW, depends on how you categorize food. Clearly some food is eaten while alive. Probably, most food - killing it first is mostly reserved for animals. Some of the time. By some species. It is clear just looking at the real world that food is not really defined by any intrinsic quality within itself (i.e. being "an object," whatever arbitrary thing that means) but by its function in relationship to the eater: food is that which is eaten for nourishment (and drink that which is drunk). Don't believe me? Look up any definition of food that you want, and I promise you won't find the word "object" anywhere.In my interpretation, food and drink are a subclass of objects. Creatures are not objects. If you kill your allies and they become corpses, then you could purify food and drink on the corpse. However, I would not allow the spell to work on the living creature.
Yes, this means that raw oysters might not be purifiable if still alive.

(Dungeons & Dragons)
Rulebook featuring "high magic" options, including a host of new spells.