> they're paying more attention to what they eat, meaning they take in more reasonable amounts of calories as a side effect.
That doesn't necessarily follow. The vegans could end up eating huge amounts of soda and potato chips, and the low-carb people could go crazy on bacon.
The difference is that if all you ate was 4,000 calories of bacon a day, you’d lose weight. That many calories of soda and chips and you’d get ill fast.
