The FDA has a cute interactive video showing how to read a nutrition label.
calories and servings
General Guide to Calories for a Single Serving
40 calories = LOW
100 calories = MODERATE
400 calories = HIGH
Ch 5 - Nutrients and Toxins
https://www.fda.gov/
https://www.fda.gov/food/new-nutrition-facts-label/calories-new-nutrition-facts-label
heal, 2011jun03, nutrition, labels, calories, servings, FDA