CGMs are available over-the-counter, just like finger stick machines, in a variety of countries like Canada and Ireland. But in the United States a prescription is required for any CGM even if insurance doesn't pay for it and insurance generally only pays for it once you are actively on full-time insulin treatment, so type-2 diabetics can't avail of insurance to reduce the cost of potentially not needing to go on recurring insulin by getting a handle on being pre-diabetic. (Plus many doctors won't write a CGM Rx for someone who isn't type-1 or very symptomatic type-2. This has resulted in nutritionist businesses springing up whose purpose is to turn a credit card charge into a prescription for a CGM.)

But of course different countries have different regulatory systems, we all know that. This is to say that even when you find a system and method that has worked for others in your online community, that method might not be available to you, and it causes even more stress to have the idea, right or wrong, that a useful tool is just out of your grasp. And carbohydrates help you if you dare move between countries.