Have you seen material changes in your blood glucose levels since going on Metformin, either fasting or post-meal?
Within about 4 to 5 days I saw some of my best post meal blood levels (in the low 80s) and fasting (low 100s) Since then they have all started to climb up again. Todays fasting # was 113.
Still on keto diet eating less then 15 carbs a day.