I have been a type 1 diabetic for over 30 years. According to what I learned during my life from doctors and dietitians, for my age/height/weight, I should take around 6 bread units of carbohydrates per meal (=6*12g= 72g).
The carbohydrates are currently forming around 50-60% of my food intake.
Right now I am looking into increasing my protein intake at the expense of carbohydrates (so that carbs remain around 40% of the daily nutrients), while remaining on the same target calorie amount per day in meals.
As far I understand, insulin regulates all of the nutrient absorption:
[Insulin] regulates the metabolism of carbohydrates, fats and protein by promoting the absorption of, especially, glucose from the blood into fat, liver and skeletal muscle cells
However, whenever I was talking to doctors, they maintained that I only needed to count insulin needed for eating carbohydrates when planning how much to inject before a meal.
So the question is whether in general less insulin per meal is necessary when consuming more proteins at the expense of carbs? Will the proteins (and fats) be able to be absorbed and used by body without (or with less than usual) insulin?