Re: Balancing carbs, protein, fats at meals...why??
Being simple, I was only trying to make a simple point:
Vegetarians who eats eggs or dairy will get adequate B-12. We don't need much, and a little animal protein will do the trick.
As to whether increased carb intake will result in reduced protein intake, etc, that's too complex for me. Some carbs--whole grains, legumes--also contain protein, and quickly the equation requires a more scientific mind that mine.
I just push, pull, run, jump, lift, and eat. How much and how often is largely a matter of serendipity.