We read repeated everywhere now that blood glucose above 140 mg/dL will cause nerve damage, and that at 100 mg/dL beta cells get stressed and they die at 110 mg/dL.
But when you look closely at the studies that demonstrate the above, you see that they are talking about the bg value at the 2 hour mark. This is very important to understand. The studies demonstrate that if your bg is as high as 110 mg/dL at the 2 hour mark, your beta cells die; more than 140 mg/dL at the 2 hour mark, nerve damage occurs; etc.
All of this is to be taken seriously. But now that we are armed with CGMs, we should ask for more accurate studies. Can we determine more precisely what bg we must stay under at all times
to avoid all diabetes-created complications?