The rule of thumb - if the product is obviously high in sugar, forget it and leave it on the grocery
store shelf. If the sugar content is low
but it still has 15 or more Carbohydrates listed on the Nutritional Panel, it will raise your blood sugar. (How much depends how much you eat of the product and how insulin intolerant the Type 2 person is). Anything under 15 Carbs, is more or less a freebie that won't tend to hurt you as long as you don't eat more than the recommended serving.