The magazine "Which?" bought and tested food from Burger King, KFC, McDonald's and Pizza Hut. The nutritional analysis revealed that information disclosed by fast food chains often understates the calorie, saturated fat and salt content of foods. According to the Burger King's web site, Whopper and Regular Fries contain 13g of saturated fat. However, the lab found 19g.

It appeared that salads were not always the healthy option because they were salty or fatty. For example, salads bought from KFC and McDonald's had 6g of salt. That's more than half the recommended daily limit.

For more information, see:

• The "Which?" magazine: Fast food claims junked [1]
• The "Which?" magazine: Fast food: the real story [2]
• Independent.co.uk: Fast-food 'healthy options' still full of fat and salt [3]