Why do calories not match the macros on nutrition labels? (USA)
Example: I'm drinking a can coke right now. 39 grams of carbs, 0 grams of protein and fat. Nutritional label says the can is 140 calories. But 39x4=156. What am I missing?
I've noticed this on quite a few packaged foods.
Answer
Different carbs have slightly different calorie counts, they’re just all rounded to 4 for convenience. And any food above 50 calories can be rounded to the nearest 10 calories.