OK, I have 2 questions about ISF. (Which I just mistakenly called ‘ICF’ in a response to someone else’s question…)
I know about the 1500/1800 rule, but it seems a bit “one size fits all” to be very accurate. Does anyone ever actually just take, say, 1/2 a unit without eating (and without IOB other than basal) and sit around watching the numbers? Obviously one would only do this while safely at home, with juice handy.
Something puzzles me. My current settings, which seem to be working well, are an ISF of 80 and an I:C ratio of 1:10 or 1:12 depending on the time of day. So, allegedly, a unit of insulin drops me 80 points, and covers 10-12 carbs. But how can that be? Shouldn’t it follow that 10-12 carbs will spike me 80 points? But they won’t.
(Or do I just have misleading data, because the only times I take 10-12 carbs without bolusing is when I’m low, and perhaps have IOB “trying” to drag me lower, so really some of the spike is cancelled out?)