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. These essential molecules come in a series of familiar sounding groups – carbohydrates, fat, protein, vitamins and minerals – but Michael and James discover plenty of surprises as they seek to understand exactly why each class of molecule is so important for the way our bodies work.