"Why take amino acids if they're all in protein and complete fcods anyways?"
This was always my dilemma. Why spend more money on nutrients that are already included in even the most rudimentary of protein shakes and/or basic whole foods? Well, one good reason is calories. Most protein shakes, from the lean proteins to the mass gainers, have a minimum of 100-120 calories per serving. Instead of taking a 120 calorie shake, you could take an amino acid powder that gives you a sweet taste, packed with all the nutrients you need (actually 2x or 3x what a single serving of whey protein powder would have) for 1/4 of the calories and without any fat or carbs!
Currently I'm taking a great VPX Amino powder. Video Review coming soon!