By-the-by, food can be meat, dairy/egg, or vegetable (i.e., plant)---right? Them is the only options, lessen you eats red-clay mud with the po' white Georgia trash. And, by definition, vegan food contains no meat or dairy/egg. So it's all plant. That being so, why in screaming butchered-bunny, blue-blazing Hell call it "plant-based"? It's all plant. Except, yeah, "plant-based" has this pseudo-technical ring to it. Which, it seems, vegan foodies find erotic when they pen their food porn.
Personally I stick to only air based breathing, with occassional admixtures of nicotine based breathing, though I have heard of `other substance' based breathing. Not that I would know anything about that.