Insulin & Bg level

This is a completely personal statistic and depends on many things such as your weight, what you eat, how much you exercise and your diabetes.

Hi. The effect of 1 unit varies greatly depending on your weight and state of the diabetes. First make sure you have a diet low enough in carbs to keep blood sugar and weight down. This should probably be well below 200gm/day and may be even 100gm/day - not always easy. Adjust the insulin to keep the blood sugar down.

It depends which insulins you are using too.
Novorapid for correcting a high blood level is normally set as 1 unit brings you down by 3mmol.
However, this does depend upon age, activity, time of day, how high your levels are etc.
If you were say at a level of 9mmol... and gave 1 unit of fast acting insulin then it is expected that the average adult would come down 3mmol to a reading of 6 within 5 hours.

Please note this is not necessarily right for you.

To test you need to be high. Not to have ate or given any insulin for 5 hours. Then inject on a 1 to 3mmol basis. Check hourly and see what your levels are 5 hours later. Again..this 2nd 5 hours is no eating/injecting. Test hourly at least. If you go low you must abandon and eat.