We all enjoy a deep-fried Mars bar with french fries from time to time, but why do we crave these unhealthy foods instead of healthy things like spinach or broccoli? And what is a food craving? The answers lie in a complex blend of our psychology, physiology, and even sociology.

BBC CrowdScience presenter Alex Lathbridge savours a mystery-meat crocket with the experts on a quest to discover the hidden sources and sauces of our food cravings.

Presenter: Alex Lathbridge
Producer: Richard Walker
Editor: Richard Collings
Production Co-ordinator: Jonathan Harris

Image credit:
Stack (pile) of cheeseburgers and french fries
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Dominic Lipinski/PA Wire