OK, this is a funny coincidence. Just this afternoon I decided to measure how much had come out after my injection.
It doesn’t happen every time, but sometimes – even after leaving the needle in for as long as 20 seconds, a big drop of blood mixed with insulin comes back out.
So today I very carefully lay the needle down at the edge of the bubble of blood and sucked it back into the needle so I could see how much had come out. It looked HUGE on my skin, but in the syringe, after I thumped it down, it turned out to be only one IU.
I figure it is mixed with blood so in fact it was probably more like a half of one IU.
I’m still going to be careful when I inject, but I’m not going to stress out over 1/2 unit.