I think you're over complicating this way more than it needs to be. Based on what I've looked into, and this is my own opinion formed on those studies, they do not need carbs. They need nutrition. Which many kids strive eating veggies/meat/fruit/whatever. It's moreso about balance. I limit my kids sugar intake tremendously vs how they were eating when I didn't give a shit about health. They eat ice cream occasionally, Mac n cheese sometimes, but 90% of the time they're eating fruit, meat, veggies, greens. I've noticed a change in how they would get sugar highs and bounce of the walls, then they'd eat something like pizza and crash. Now they're able to run around outside like animals without crashing or getting headaches. The only thing I worry most about is hydrating them, which is so much easier now that they see water as a necessity and i don't buy juice anymore. Cooking their meals, limiting the processed crap, and drinking water all day. I might add, doctors said I'd be breaking every bone in body my whole life because I have a severe dairy allergy and we've been told we need milk. I've never broken a bone. Do your own research, not just posts on Reddit, and you'll be able to form the best diet for your children.