A1c is effectively an average (mean) of your BS over the last 30 days or so... as such it can be misleading if your BS swings wildly... for example: many highs balanced by the same number of lows can still produce a good average. How often do you test yourself? Some folks have a reactive type of D where intake of carbs causes a rapid up-swing in BS followed by an equally rapid down-swing as the insulin kicks in. Perhaps that is why your BS looks so good at 2 hours?
When I first cut out carbs I used to get some headaches as my body adjusted... the brain likes carbs and we can get a high from sugar, but it does not require carbs as an energy source. All the food we eat is broken down into its components and reused or stored: protein is broken down into amino acids (its building blocks), fats into fatty acids, carbs into sugar but while there are essential amino acids that the body requires to be healthy, and essential fatty acids, there are no essential sugars or carbs that the body must have to survive.
I don't rely on my doctor or dietitian to tell me what I am "allowed" to eat... I test my BS and find out what works best for me. But if you are eating 2 candy-bars each day you are clearly not listening to their advice anyway unless your are using them as meal substitutes?
