CGMs from aliexpress are $20 USD for two weeks of blood glucose monitoring. I think as part of everyone's normal health monitoring they should slap on a CGM and just see how they are doing, maybe once a year or two.
Especially if someone is having problems, weight issues, sticking to a diet... the immediate visual feedback of seeing blood glucose in real time is a game changer and makes sticking to a plan much more effective.
There are a bunch of issues you can see with just glucose monitoring
- Diabetes (heh)
- Poor glycemic control (insulin resistance)
- Stress
- Sleep issues
- Hypoglycemia (insulin resistance again)
- "snack" frequency
- fake "health" foods that spike glucose
Someone with a "normal" hba1c can have really spikey glucose control which means their quickly approaching full insulin resistance, and the CGM would show that years before the hba1c creeps up
