I guess I should have specified that I am wonding about abnormal blood sugars before meals.
Normally, I take my insulin within 5 minutes of taking my first bite.
If my blood sugar is above 180, I will wait a half hour, probably, before I begin to eat. If it’s higher, I wait longer.
If my blood sugar is below 70, I usually take my insulin about 15 to 30 min after I start eating the carb part of my meal, depending on what I am eating, and how low I am. (I have had lows during meals because my insulin starts working before my carbs do.
My sugar drops between 55 and 85 units per unit of insulin at dinner time, depending on the time of the month.) See, if I check at 2 hours after my insulin, then I know I have about 70% of my humalog left, and then if I have taken too much I have time to correct, and if I undershot, I haven’t been out of range too long. I thought part of why the 2 hours should start when we take insulin is because it’s easier to calculate one set insulin time.
Maybe it doesn’t matter if I am consistent.