I dont have an answer for you but my morning test has been around 8.5 the last week or so (newly diagnosed, so much higher before that). My premeal tests at night has been as low as 6.1-6.5. Im on 4xMetformin/day and I eat pretty strict LCHF. Someone recommended to drink a glass of farina (potato starch) mixed with water, 2 tbs/glass, before you go to bed. I started out with 1 glass of 1 tbs farina+water last night and this morning my test was 7.0. Im going to try this out some more, in the hope to get my morning test even lower.