I'm an Insulin dependent diabetic, & while insulin use dropped my A1c into the 7's, I wanted to be closer to normal.
My Endocrinologist worked with me to find how many grams of carbohydrates would need one unit of insulin.
Since then I have calculated the exact amount of insulin needed to keep me in the high 70's to low 80's by the time of the next meal. I calculate immediately after a meal & take my insulin After the meal. For the past year, my A1c average has been 5.9. A bonus to this tight
control is my LDL, VLDL & triglycerides have dropped into a below average range & my HDL has risen from 38 to the high 50's. If you choose to work with your Endo, you have to make absolutely sure that your meals are spaced equally or you can have hypoglycemic episodes that pose serious health risks.