PDF Read the Food Label for Carbohydrates - NHLBI, NIH Read the Food Label for Carbohydrates Food labels help you choose foods that are lower in calories and in carbohydrates and sweeteners. Here is a food label for a 12-ounce regular soda. The label provides lots of useful information. 1. Serving Size and Number of Servings The serving size is 12 ounces. There's 1 serving in this container. 2.