If I read that article correctly it seemed to be pointing out that sometimes calories are literally mislabeled. That is - a sandwich from a vendor may be labeled as 400 kcal but actually it turns out it was closer to 500 kcal. Casey Neistat did a special for the NYT a couple of years ago about this very problem [1]. The ArsTechnica article you linked did go into other things - but there&#x27;s definitely a difficulty in dealing with things where labels say one thing and can be 10-15% wrong pretty easily.<p>[1]: <a href="http:&#x2F;&#x2F;www.nytimes.com&#x2F;2013&#x2F;02&#x2F;13&#x2F;opinion&#x2F;calorie-detective.html" rel="nofollow">http:&#x2F;&#x2F;www.nytimes.com&#x2F;2013&#x2F;02&#x2F;13&#x2F;opinion&#x2F;calorie-detective....</a>