my guesses..okay, smart guy. You question is very unclear to start with ? If you take any carbs with 1 iu - your BG wil go up, not down, 2nd , if u dont take any carbs - everybody reacts deiferently - there s no formula how many points , plus the first time u use it - u can go hypo very fast, abut after 6 weeks of usage and eating the necesarry carbs , even 10- 14 iu's wont get you hypo....