I have noticed that many items contain sugar alcohol and subtract the full amount off the total carb count. I was told to only subtract 1/2 of them off. Why the discrepency ?
You’re correct: if there are more than 5 grams of sugar alcohols in a product, the guideline is to subtract half of this amount from the grams of total carbohydrate. So, for example, if a product contains 30 grams of carbohydrate and 10 grams of sugar alcohols, you would subtract 5 grams (half of 10) from the total carbohydrate, thereby “counting” this product as having 25 grams of carbohydrate. The reason for subtracting just half of the amount is that sugar alcohols are types of sweeteners that are partially digested. Therefore, some of the carbohydrate in these sweeteners are broken down into glucose and can impact blood glucose levels -- and they can also provide calories.