I had peaks UNTIL I started this system. I don’t completely understand WHY it works, but I have found that it does work. Here is my best attempt at explaining it.
If I took all the insulin an hour before eating, I would have terrible lows. If I take it as a dual wave bolus with only half the insulin upfront, then my blood sugar already starts to drop while I am eating. Then the rise of blood sugar from the food is immediately counteracted by the insulin without ever needing to go above 120.
It is all about timing the insulin and the food correctly. By splitting up the insulin and using the dual wave bolus, I also prevent such dramatic swings in my blood sugar. If I go low, I don’t go low as quickly as if I had given it all in a single bolus.
I would love to try this with a CGMS so that I can figure out the right timing. Perhaps I should be giving the dual wave over 15 minutes, or 30 minutes, not one hour. Some day perhaps I will get to try this out with CGMS.
There are several other people in this community that use dual wave boluses to avoid post-meal spikes. I couldn’t understand the logic of it at first either. BUT trying it showed me that it does make a difference and the real advantage is being able to wait til your blood sugar is dropping to eat without it dropping too low.
Perhaps someone else can offer insights on this, as I am new to the dual wave bolus!