I have been a type 1 diabetic for 23 years and strangely enough I still don't have any idea how long it takes for my fast acting insulin to kick in. I tested today at lunch and I was at a high of 21.2 mmol/L. I believe that I had breakfast without taking my insulin. After something being like second nature it's funny how you can forget if you actually took it or not. Anyways, I went for a 7.5km run and it took me 41 min. I thought that my blood sugar would be relatively lower but to my surprise it has only gone down to 19.0 mmol/L. This is what made me wonder how long does it take for insulin to kick in? Should I take more? I take Novorapid; 1 unit for each 10g of carbs ingested as well as Lantus before I go to bed. I've looked it up online but of course like everything else the answers vary from one side of the spectrum to the other.
I'm hoping that maybe one of you well educated diabetics or diabetes worker can help me out.