On Nutrition Facts food labels, the grams of dietary fiber are already included in the total carbohydrate count. But because fiber is a type of carbohydrate that your body can't digest, it does not affect your blood sugar levels. You should subtract the grams of fiber from the total carbohydrate.

Does fiber neutralize carbs?

Fiber also slows down your body's absorption of digestible carbohydrates, which keeps your blood sugar levels stable. This, in turn, reduces your risk of developing type 2 diabetes.

Does fiber cancel out carbs on keto?

Many people on a keto diet count “net carbs,” which is total carbs minus fiber. Fiber isn't “counted” in the carbohydrate total, because it's not digested.