So I am supposed to fast for 12 hrs for blood work for health insurance. I don't know that I can without my blood sugar dropping too low. Does anyone know how much it will mess things up if I don't fast? Twelve hours seems excessive. I could probably do 6 or 8 if I spend that time sleeping. Triglycerides, cholesterol and blood sugar is all they are checking. Can't find a thing on line about it of course. Or maybe I'm just not using the right words to search.