Yep it feels like shit when you get to low. I have been doing this for about 6 months now and I try to stay high 4's which I feel pretty good at. I have to stay with really low glycemic foods... and I do. I am not much of a bread pasta or sugar eater. Only sweet thing I like to eat still is very young cat lolI hit 4.2 and start to feel the effect of hypoglycaemia. I hate that feeling.