> In fast food, people are eating a day's worth of food in one sitting. Triple burger, large fries, large drink. People are doing this once a day every day of the week.Then they go home and order more high calorie food with high calorie drinks and constant snacking.

The UK had a reality TV show called Secret Eaters where they signed up people to be monitored 24/7 by cameras and private investigators which tracked every single thing they put in their mouth and counted up the calories.

It was really informative to see how some people eat and it is not pretty. Even the people who didn't regularly eat fast food or go out to chip shops ate way more than is healthy with fatty sausages, fried things, and little fruit or vegetables, all in huge portions.

I'd love to see that happen with people that are keeping a food diary and see how much they're being honest with themselves.

Though their behavior would probably change if they knew they were being recorded.