What Causes Rise In Sugar Levels On Eating Certain Foods?

i am a pre diabetic and have a family history (my father was a type 2 diabetic), i try to eat less carbs, although i never add sugar to anything i eat , don t eat rice and bread - i LOVE pasta. I measure my blood glucose at home and it always normal, as soon as i eat a little bit of pasta glucose jumps to the borderline or beyond. What is your advise, what could be done if i still want to enjoy a little bit of pasta? thanks.