Hi Roch,
You kindly posted on my welcome thread, so hope you don't mind me posting on here. About your low blood sugars... I know a bit about this because of having 2 daughters with Type 1 diabetes, although I am NOT a medical person! Firstly, I assume you are not Type 2 or on tablets for it, because they would cause you to hypo on a VLCD, as your body would be being stimulated to produce more insulin than needed for the small amount of carbs in the shakes/bars.
I always think of insulin in the bloodstream as like little pacman-type thingies (showing my age here I fear!) that race around gobbling up glucose in the blood. When all the glucose has been used up, excess insulin will cause you to hypo. This is why TYpe 1 diabetics, who HAVE to take insulin by injection are not allowed to do VLCD's.
With Type 2, the tablets are not insulin, but they stimulate your pancreas to produce more of it and also sensitize your body to make better use of it. So on a VLCD dosages usually need to be adjusted downwards and sometimes even stopped.
If you are not diabetic, but are insulin resistant, your pancreas is used to pumping out large amounts of insulin to cope with all the carbs usually eaten. I think that what then happens is that when you go on a VLCD, your intake of carbs is suddenly drastically reduced, but your poor old pancreas carries on as usual, pumping out the insulin, and bingo, you hypo (ie, your glucose drops below 4.0 and you feel awful). I'm not sure how long it would take for your pancreas to readjust, a week or 2 maybe? Your Dr would know better than me.
I think that if you ate a small amount of carb when you 1st started feeling hypo, you would be able to bring your glucose level up above 4.0. When my daughters hypo (regularly!) they have approx 10g carbs to treat the hypo. And they go REALLY low sometimes, we had a 1.5 from one of them the other day! 15 mins after the carbs she was 4.2, feeling tired and starving, but okay.
I must stress again, I am not a Dr and please keep consulting yours, but I think you may be insulin resistant and that is why you go hypo when you start a VLCD. And I think having a small amount of carb (say 2 teaspoons of sugar dissloved in a small glass of water, or 3 dextrose tablets which you can buy OTC) would treat your hypo successfully.
Do you have a monitor to test your glucose levels? May be worth asking the Dr if you could have one, then you may be able to avert 'emergency' type situations again.
Sorry to ramble on, as I say this is only my understanding of things, but hope it helps.
SM