I'm not a doctor, but I believe the best way to treat your body is not to have big swings in values in glucose. If your glucose is 70 and you spike it up to 150 every day, I believe it's just a lot of stress on your body's endocrine system.
Someone can definitely chime in and correct me though.
You not only get the downside of high glucose levels from the spike, but you get the downside of the insulin your body produced in response (or you injected because you're diabetic) kicking in as the spike falls on it's own, making it crash even further.
Glucose spike -> oh shit blood is full of sugar, pump out insulin -> blood is suddenly not full of sugar anymore -> feel like shit, want to eat again -> glucose spike...
Insulin will seize sugar from your blood to store it your cell reserves. You are basically forcing yourself to store fat, and require more sugar, instead of using what you have.
No, I'm a biochemist. I need to know the mechanism. The mechanism is important for understanding why and how something happens in a biological system, sorry I just don't take people's word at face value
You could have said something like "eating foods that continuously spike glucose could possibly cause an eventual desensitization to insulin by causing down regulation of insulin receptors"
But you don't get to type 2 diabetes by eating potatoes
Someone can definitely chime in and correct me though.