I tried just protein, but I got so hungry I overate carbs. I find I have to have even just a half piece of toast in the morning, or I'm craving something sugary. I once did just basically live off of protein, some nuts, barely any dairy and almost no carbs, my sugars dropped so low overnight I woke up in sweats. Balance is so necessary but so hard to stick to. Right now I'm craving a cookie. Bought some for my sons, but if its here, I'll likely get into it. I have no idea how my a1c's are fairly normal, because I'm not strict with myself and give in to temptations.