Initially I improved my glucose levels to pre-diabetic within 3 months of T2 diagnosis (HbA1c down from 60-62 to 47, and also lost around 20 kilos), simply by cutting out all the obvious high carb food from my diet, as I wasn't aware of the existence of glucose meters. I've always eaten normal (full) fat food.
Since then I've used a meter most of the time (and the original Libre sensors for a while) and my Contour meter allows me to set my own target ranges, and it fairly accurately predicts myHbA1c levels. I'm a bit of a data "freak" and I'm interested in what and how issues other than a low carb/ketogenic diet (e.g. health, illness , pain, certain medications, stress, etc ) can impact on my glucose levels. While spot checks for such issues can be useful, I don't believe that simply doing a few random checks otherwise are actually helpful.
@0110 : My liver prefers my dawn phenomenon level to be about 7.0, but it's often lower, and since it's essentially
its choice not mine, I tend not to bother too much about it - my glucose levels tend to reduce during the day anyway. Something I first learned when starting to use a meter.