Might be slightly different because I am t1. However, my target is 5.0mmol/like + or - 0.5. Whenever, I inject for food, I take into consideration three things when calculating my dose:
- carbs in food
- current BG
- insulin on board
Thankfully, my pump does most of the calculations. But this is a long winded way of saying, it makes perfect sense to me to lower your insulin dose slightly if your current BG is below your target. Likewise, increase your disease if you are above target (it's called a "corrective dose").