It's very individual Jenny - but the fact remains that we all have a condition that results in our bodies being unable to cope properly and in a timely manner, with converting carbohydrates into 'fuel' for the cells.
Some people's bodies cope very well by eating 'slower release' carbs Some people don't so they will try 'curbing the carbs' which is quite sensible under the circumstances.
It's a little known fact that our bodies don't actually need ANY starchy (ie very fast release) carbohydrate and most of the NHS will argue till death that that is incorrect and the one thing we MUST eat is plenty of flipping starch. The reason we don't need it, is because the fuel the cells esp the brain use, is actually glucose, not carbohydrate. And the body can make glucose out of carbs, protein and fat. However compared to carbs, the protein will only produce 50% of the glucose the same amount of carb would, and fat 10%. So you can 'low carb' to your heart's content and none of you will die from that!
The only things you'll see in consequence usually are 1. weight loss and 2. a lowering of your lipid levels - because carbs cause that to be increased, especially the LDL cholesterol level which they are all so very fond of prescribing statins more statins and higher dose statins to fight. Why take a pill (which has some not very nice - changing quality of life - side effects for about 10% of patients)
The only way you'll know what's OK for you to eat and what isn't is to get yourself a blood glucose meter and the test strips and test before and after you eat, noting the foods that have unwanted effects on your blood glucose. You may not have to cut them out entirely, it may be that you could just eat less of those ones and do fine. A 3 monthly HbA1c blood test won't tell you THAT.
