So if you can get all of your macro needs from protein/gainer/carbs powders, throw in some canolia or olive oil for fat, and supplement with multi-vits and whatever else. Why not? Is there a downside I'm missing to not eating real foods.
Please do not answer unless you have a reason or sources to back your answer.
I mean I imagine you would need to get a minimum amount of fiber, so let's say you have a fiber rich cereal once a day... why not?