I found this article interesting on the history of food labels. It isn’t lengthy but gives a quick overview on the who, what, when, and why.
“Believe it or not, we decide what a serving size is. The unit we see at the top of our nutrition labels (eight cookies, 100 grams, half a bottle, e.g.) comes from the average amount that Americans over the age of four consume in a single seating. And that average comes from federal food surveys.”
Think about that next time you eat half a bag of chips during a sporting event. (or choose your favorite food and time to mindlessly eat into that sentence)