By doing a basal test. Inject long acting, don’t eat, test every hour, see if sugars go up or down more than 2 all day.
Not quite that simple but that sums it up.
The way my level was adjusted was by looking at my fasting glucose levels. If they were high my basal was lowered unit by unit until I got a nice steady within target level with no, or fewer overnight hypos.
By doing a basal test. Inject long acting, don’t eat, test every hour, see if sugars go up or down more than 2 all day.
Not quite that simple but that sums it up.