The ADA states that our glucose levels shouldn’t increase above 140 mg/dL after eating. But again, that’s “normal,” not optimal. Studies in nondiabetics give more precise information: we should strive to avoid increasing our glucose levels by more than 30 mg/dL after eating. So in this book I will define a glucose spike as an increase in glucose in our body of more than 30 mg/dL after eating. The goal is to avoid spikes, whatever your fasting level is, because it’s the variability caused by spikes that is most problematic. It’s years of repeated daily spikes that slowly increase our fasting
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