If you have ever had a blood test to check your glucose level, you got a "snapshot" of what it was at that exact moment in time.
If you have ever gotten a "HgA1C" test, then you've seen a "snapshot" of your average blood sugar for the 3-month period of time leading up to that blood test.
But what you DON'T have is a continuous reading of your blood sugar during a 24-hour day, day after day. You have no idea what's happening when you are fasting, after eating, with exercise, and during sleep. You can't tell which foods YOU react to with a blood sugar spike and which foods work great for your blood sugar control!
That's where a continuous glucose monitor comes in.
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