Those have been debunked.. That is mostly broscience that have been proven to be false in the bodybuilding world. You get enough glutamine in your diet alone, no need to supplement it. And the "post workout window is " within 1-2 days, not 30 minutes after the workout. feeding 10 minutes after a workout, and feeding 6 hours after a workout will yield the same results. just make sure you everything before the end of the day and you will be good. and fats dont slow down digestion.
and simple carbs and complex carbs are the same thing for body composition. They let out a different energy, the complex will release slow/long lasting energy, BUT as far as body composition, your body will use both types of carbs the same way when improving body composition.
years ago yes they believed it..-- this is old school information, but new studies have proven all this to be nonsense.
just thought i would add my 2 cents to this thread.
Alan Aragon has some good articles on his website if you want to look more into it.
http://alanaragon.com/