Physical activity, mental activity, and sickness can also massively effect dose.
On days I'm physically active I feel like I need less than half the dose of insulin then days I'm caught behind a desk. This said, high impact mental stress that requires lots of thinking can rapidly drop my glucose level.
And that's not counting being ill where my body will pretend like it's insulin resistant for hours then suddenly try to process it all at once.
2 other factors other than physical activity and stress that seem to impact insuline sensitivity:
1. Temperature (room / outside)
2. How well you’re hydrated
Regarding the *time* it takes for eaten Carbs/glucose to enter the bloodstream, it seems that simply standing/being postural often slows down digestion, while sitting/laying down (think of a couch potato watching tv) seems to increase digestion speed.
Physical activity, mental activity, and sickness can also massively effect dose.
On days I'm physically active I feel like I need less than half the dose of insulin then days I'm caught behind a desk. This said, high impact mental stress that requires lots of thinking can rapidly drop my glucose level.
And that's not counting being ill where my body will pretend like it's insulin resistant for hours then suddenly try to process it all at once.