[jodrellblank]

It's better to argue "weight gain = calories in - calories out" is not the whole story than to argue that it's completely wrong - you can't eat and drink nothing for a week and just get heavier, but what you can do is more like... eat 3500 calories extra in a week without putting on a pound of fat (1lb of fat ~=3500 calories) because your body is not trying to store as much as it can as fat, or eat -3500 calories in a week and end up slowing down your metabolism and moving less and destructing other bodily parts so you turn it into a calorie surfeit and do put on a pound of fat.

This comes up in Hacker News every time a health story comes up, usually quoting a pop-sci writer

Bit of an ad-hom on pop-sci writers there, eh?