In the final episode, Michael and James explore the effect of 'food on the brain'. The brain is one of the greediest organs in the body in terms of the energy it needs to run. The way it influences our diet is, in the main, by generating the cravings we all experience.

Michael heads to Spain to search for some of the most powerful tastes on the planet, whilst James travels high in the Peruvian Andes to discover how a bitter potato - a cousin of the humble spud - has been tamed to help the inhabitants survive the extreme altitude. Using the latest imaging techniques to take us inside our food, right down to the molecular level, Michael and James offer us a whole new way of thinking about taste: far more than being just delicious, it's actually a matter of survival.

In the first episode, Michael and James explore how the chemicals in our food feed and build our bodies.

The world is full of different cuisines and thousands of different meals. Yet when they're reduced to their essence, there are actually just a handful of ingredients that our bodies absolutely need from our food to survive.