No. That’s all pretty well established. You can look in books and find the amounts of glucose and other sugars and starches (basically a bunch of sugars chained together) in various foodstuffs.

If you are worried about YOUR glucose tolerance a HgbA1C is the way to go unless you want to go old school and get a glucose tolerance test (GTT).

https://medlineplus.gov/ency/article...%20differently.

They basically have you slam enough glucose to make you sick to your stomach (about 300 calories worth) and then see how long it takes you to metabolize it. Maybe using continuous monitoring would probably THEN be better than the old school which was three hours of periodic blood draws but even so, a HgbA1C would give you a better assessment since it averages out how your body has handled all your dietary intake over the last three months rather than trying to extrapolate from an artificial three hour test load.

As far as assessing your prediabetic status, that’s far more accurate than a three hour GTT