Maybe do a little extra-close checking when you smoke--like check your blood sugar an hour before, during and, say, 30 minutes after you smoke. You'll want to do this under controlled circumstances when, say, you've not added anything new into your diet. Just see what it does to your blood sugar like you would if you ate a bunch of new foods or were taking new medicines or something. And then you'll know. If it makes your sugar drop, then you'll know you need to make dietetic adjustments. . . . just a thought.