I believe it. I've been close enough that I take food with me everywhere. I can literally feel something that feels like it's draining out of my head. I used to eat subway sandwiches with that cheap bologna. Half an hour to an hour later, I would be shaking and in tears and all confused. The Dr said if I get to much sugar/carbs at once, my body goes in over drive and makes to much insulin. That insulin eats up my sugar and there's none left for my brain. Granny, is that how you understand it? Most people think you aren't eating enough sugar but actually you eat too much