Here’s an all-too-common scenario: It’s mealtime and you break out the oatmeal, peanut butter, blueberries, and yogurt, and the measuring cups and spoons. You measure out one cup of oatmeal, one tablespoon of peanut butter, and half a cup each of blueberries and yogurt. You cook it all up, scarf it all down, and move on with your day. Unfortunately, you’ve just eaten a couple hundred more calories than you thought. How did this happen? Well, that (slightly heaping) cup of oatmeal that you scooped out contained 100 grams of dry oats and 379 calories. The “cup” on the label, however, contains
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