Staring at the discussion here is reminiscent of my prior problems. My glucose numbers were at 238 at wakeup and dropped to 180 mostly till it was discovered I had a nasty dawn phen in am that the liver was throwing the full buffer at my body every am and ocassionly do liver dumps and throw the blood glucose up to 500 and slide back to 278 to 315 as heart pumped the glucose around body diluting it.
With my Doctors help; I found that if I walked 2 miles exercise in morning; this would burn off the excess glucose in am and numbers would drop to 140 and under.
Furthermore, this load of glucose was saturating the muscles and causing extreme insulin resistance. So much that 26 units of 75/25 humalog acted like water and sat circulating in my body till I burned off the excess glucose. I got a Dexcom 7 at the time and was a godsend enabling my Doctor to get a picture of what was going on.
Metformin turned out to be the magic bullet that help get the liver's excess blood glucose release arrested and restore sanity.
Contrary to the idiot science out there; with the cgms one could see my liver leaking all the time dumping in excess glucose hammering my numbers.
In the end, I ended up with a diet of 1200 calories low carb - mediteranean and 2 miles a day walking and metformin and regular humalog lispro U-100.
Metformin doses were structured in 500mg doses aith one dose 1 hour before each meal and then 1 dose at 10:00pm and one at 12:00am midnight that effectively shut off excess liver glucose release.
I had also used lantus but did not find that helpful. It worked but not enough to really stop the mess.
In the end, once the liver's excess glucose escapade on dawn phen and liver dumps was arrested by the metformin, then diet and exercise did the trick to putt the world working properly.
There is this utter stubborn resistance to consider the fact that if the liver buffer is big enough ; that it can swamp and overwhealm the muscles and shoot the insulin resistance through the roof. The amount of glucose the muscles can store is finite and when the skeletal muscles swamped the dam glucose backs up in the main blood system with horrendous numbers.
Until my Doctor got the metformin doses and timing good on cgms, diet alone was tried but found insufficient to arrest this mess. The next step was the walking two miles in 1/4 mile loops and watch the glucose readings and after 8 loops, the blood sugar would drop dramatically and then run normally till the next morning when dawn phen shot it back up to 238 and I walked it off again!. Lastly, meformin proved instrumental in arresting this mess.
Which in my case using cgms could see the timing and cutoff by metformin on my liver each time a dose came up to sufficient strngth in my blood stream. The liver stopped leaking and flattened out rather than continuously climbing!