Hi - I wonder if anyone else has experienced this. I have started testing the foods I commonly eat with a glucometer to see if anything spikes my blood sugar. I normally test right before, then 30 and 60 minutes after eating. Sometimes my blood sugar reading will be lower at 30 minutes than it was before I ate. Like today, had 1/2 cup cauliflower rice with curry chicken. My glucose was 82 before eating and 72 after. What could be going on? Does this mean the food somehow had an insulin response that drove my glucose down - even though it hadn’t gone up in the first place?
Curious glucose readings
You are in the safe zone, and the readings aren’t perfectly accurate anyway. You are successfully keeping your blood sugars stable. This is good.
Our bodies start to release insulin even before we start eating in preparation for the meal; it will even release insulin just by thinking about food and how much it releases depends on how hungry we feel. It’s called the Cephalic Phase Insulin Release (CPIR) and it reportedly only accounts for 20% of the insulin released during an entire meal, but that can be substantial.
If the CPIR is relatively high, that means there will be a time when insulin is driving down blood sugar, but the nutrients from the meal haven’t entered the bloodstream, so blood glucose would decrease.
I use the Freestyle Libre, and quite often find a small decrease about 30 minutes after I start eating.