Because I get an acute and long lasting dawn effect, with my BG numbers doubling between 5 a.m. and 2 p.m. while intermittent fasting, it has reasonably been suggested that I have a fatty, low carb breakfast upon arising. But does this not rule out intermittent fasting for me? I was doing an 18/6 most days but these high and long running dawn effect numbers are disturbing. In fact, only breaking the fast starts bringing them down.