Total carbs, I'm not entirely sure. My body reacts to Net Carbs, which is (Total - Fiber). As for net carbs, I eat anywhere from 5-15g

Some diabetics cannot subtract fiber, because they respond to the whole load via their glucometer. Fortunately, I'm not one of them.

Ah, you're pretty strictly keto then. I try to follow keto and have had good success with it, but after a month of strict 20 grams of carbs or less, I've relaxed it a bit and I often creep up to 30 or 40 net grams of carbs a day.

Still feeling great and losing weight, although perhaps I'd lose a bit faster if I remained stricter about it. I'm also not diabetic, although my A1C numbers were getting close to prediabetes levels before I started the diet. I expect that to drop the next time I get my blood checked, though.

I'm 6'5", at time of type 2 diagnosis, I was 320 lbs, 44" waistline, a1c=7.1, fasting glucose=161 mG/dL . That was last December. They caught it in time before I really had many symptoms, although I was starting to get erectile dysfunction (one of the first things to cause problems, BTW).

Fast forward to now. 260 lbs, waver between 36" and 38" waistline, and feel better than I have in decades.

My only problem is my stomach is a perfect sensor for "Hidden Carbs". I'll get wonderful things like stomach pains and bad indigestion over things like flour in gravies or sauces, or hidden corn starch, or sugar sprayed on salads.

Now, Metformin. I have a prescription for it. I don't need to take it, UNLESS I'm eating somewhere I cannot control my carb load, let alone know what my carb load is. Holidays are notorious about this, as are buffets and similar places. My solution is, I take metformin before I go to sleep the day before, through the whole day of, and 1 pill the morning after. It effectively is a form of a PID control loop for glucose.... which is what I need.