Fasting blood glucose does not indicate how the body responds to meals in a fed state.

“But, as as you're pointing out, Cara, with only one point on a 24-hour graph of your glucose, you can't tell anything about really the morphology of your postprandial glucose curve, which is really the most important piece of data here, the way your postprandial glucose trend looks and something called the area under the curve, which we'll talk about, which really gives you a good sense of your insulin sensitivity, essentially synonymous with metabolic health, which is what this whole conversation is about.”