Hi Wayne
Your question suggests you are struggling to control your Blood Sugar levels and getting low BS's. So that first thing to think about is your insulin dose. If you are eating enough to satisfy your appetite and still getting lows you are taking too much insulin. Seek help from your Diabetic health team. Working out whether its too much Lantus of too much Novorapid or both is not easy and will take a period of gentle adjustment (with support of your health team) to get doses that give you a more even BS through the day and through the night. Thats the goal.
The swings between high BS and low BS that make diabetic life so difficult are a result of the very blunt nature of injection applied Insulin combined with the need to correct the swings when they occur. Like trying to ride a bike when you only have a sledge hammer to bang on the handle bars to steer. Its bloody difficult. That is what your health team should have told you and I bet they didn't!
Low GI carbs will, in my experience help temper BS variance a little but not significantly. All carbs get turned to glucose by your digestion system. It's just a matter of how long it takes. Possibly 5 minutes to 20 minutes but always variable.
That said, Mokkijo is right but should have said that it is dangerous to reduce carbs without reducing insulin at the same time. You will see from the Low Carb forum that many many people have found that If you eat less Carbs you will need less insulin which also reduces the tendency for blood sugars to swing from low to high and back.
Best of luck.