Certainly for hundreds of thousands of years as hunter-gatherers we ate SIGNIFICANTLY less carbs (both simple AND complex) than we do now, and it makes sense to get closer to the diet that our genes and proteins were set for. Our ancestors did not die of cardiovascular disease like we do. That is diet and lack of exercise.
And you certainly can eat your Froot Loops, just moderate.
A ping for your interest...old thread that just reappeared.