Ive tried extreme dosages of powders through the years but nothing comes near Rich Pianas raw food powder. Containing real sweet potato, yams, oat and fruits. Finally you can eat 10 times a day without eating.
Ive tried maltodextrin and other carbpowders but its far from real food. And Pianas foodpowder.

With casein/whey it gets me through my workday.

But its expensive as hell. Got it from a norweigian site. Over 100 dollars for 1,8 kg.