Recently I've been frequently consuming protein/nutrition shakes. Sometimes I make them myself using whey protein powder or a mix. Sometimes I buy them from cafe's such as Starbucks' protein/fiber powder containing Vivanno, or one of Jamba Juice's offerings.
I've been wondering though - am I really getting the full benefit of these nutrients when they've just been added to a drink in powder form? Or do I have to actually eat more natural foods like beans, eggs, meat, vegetables, etc, to get the full benefits? Is there any strong evidence one way or the other?