They're cheap and easy, but what are the health risks associated with processed foods?

The link between diet and health outcomes is well documented. New findings, published by the British Medical Journal confirm that a diet high in ultra-processed food is linked to a number of health conditions.

A pile of cheeseburgers and french fries. Harnessing the rebellious streak among teenagers may help efforts to get youngsters to cut down on junk food, a study suggests. Credit: Dominic Lipinski/PA/Alamy