Nutritional Labels for Keto: Everything You Need to Know Total Carbohydrate (5 grams) - Dietary Fiber (1 gram) = 4 grams of Net Carbs While calories also matter on the ketogenic diet and you should keep an eye on these, they aren't as important as keeping your carbohydrates low. Sugars You might have noticed that sugar is incredibly prevalent in many of the foods we buy.