I am currently trying to control my bg by LCHF and recently started 500mg Metformin daily. I have been aware for a while of feeling a little nauseous from time to time, but this morning it is bad enough to be disabling. I'm worried my body isn't tolerating HF, but as I am eating under 20g carbs daily and am underweight I don't see any alternative if I am to continue LC. First thing this morning my fasting bg was 4.8. I immediately consumed some cheese, 10g brazil nuts and a large mug of tea with cream (my usual breakfast) as when my bg is low it tends to rise if I fast. Now I feel as if I would never want to eat again. Going back to the balanced Mediterranean style diet I was eating before is not an option, as my bg levels were rising year on year and I had various symptoms which have abated since I started LCHF.