| OK... as above I think that you are over-complicating things. For example... what does a 12 hour fast tell you about how your BG behaves on a "normal" day? Also as stated above you would likely need a few days without insulin to be sure that there is none left active in your system... even the shortest acting has been found still active a day or so after injection. But fasting for too long without insulin, is risky if you are a Type 1.
You need to try and establish a normal day and work the carbohydrate, insulin and BG numbers around that. You will find that the management of Diabetes is less of an exact science and more of an art... you can do the same things (food, exercise, insulin etc...) two days in a row and get different BG readings. So you need to test your BG spike after meals and be prepared to adjust the carbs and insulin to improve your BG levels. Read about basal testing.
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Frank
51 year old male, Metabolic Syndrome Dx Mar. 2003 | 
