From Michael Pollan's 'In Defence of Food'
A few years ago, Rozin (University of Pennsylvania) presented a group of Americans with the following scenario: "Assume you are alone on a desert island for one year and you can have water and one other food. Pick the food that you think would be best for your heath"
The choices were corn, alfalfa sprouts, hot dogs, spinach, peaches, bananas and milk chocolate. The most popular choice was bananas (42%), followed by spinach (27%), corn (12%), alfalfa sprouts (7%), peaches (5%), hot dogs (4%) and milk chocolate (3%).
Only 7% of the participants chose one of the two foods that would in fact best support survival: hot dogs and milk chocolate
Which demonstrates how our understanding of what is 'healthy' is skewed by fashion, prevailing medical advice, prejudice... Interesting, eh?