@Rose28
As already stated in
@beatdise's earlier reply this involves using your meter, by taking counts before and after meals, to teach yourself what food to avoid completely and what quantities of other food you should stick to in order to meet certain predetermined glucose level targets.
In effect you are using feedback from your meter to make better choices in your next meal selection thus learning from past mistakes.
And since this is an exercise in achieving target glucose levels and carbs are the main contributors to glucose rises, in practice this is a way to learn how much of different carbs your body can manage.
What should those target be:
NICE sets target levels for t2 diabetics not on insulin or other hypo inducing meds as 4-7 mmol before meals and less than 8,5mmol two hours after meals.
If trying to work down to these levels from a higher starting point, you can expect to need a few weeks or so to achieve it.
In the meantime concentrate on the rule of thumb that your 2 hour after meal counts should not be more than 2 mmol higher than your corresponding count before the meal in question. If you find that the after meal count is more than two mmol higher than the before meal then your meal had too many carbs in it and you should have a smaller portion of whatever carb rich food it contained, the next time you have the same carb rich food. Keeping a food diary helps truck this.
Once you hit this 2mmol target consistently you should see that your before meal counts also reduce, hopefully all the way to the recommended levels and even beyond.
Once you have achieved the levels for t2 diabetics, you may like many on this site, like to lower your levels further to the non-diabetic range ie less than 6 before a meal and less than 7,8 two hours after a meal.
There is no really set amount of carbs one should start with, but I have seen 150g of carbs per day, often mentioned as a convenient starting point from which to adjust according to your readings.
Reducing carbs in order to control glucose is all very well but that involves reducing calories. This is good if you have excess weight to shed but not so good if you don't or if you find that you feel too hungry in order to stick with the reduced carb diet. What do you do? You get the missing calories from a food source that is not rich in carbs such as non starchy vegetables or in many people's opinion healthy fats. The other option would be to increase protein but that is believed to increase the risk of kidney problems.
I hope the above is useful to you.
Pavlos