Exciting discoveries have happened in the past five years in labs around the world: they’ve revealed our body’s reaction to food in real time – and have proven that although what we eat matters, how we eat it – in which order, combination, and grouping – matters too. What the science shows is that in the black box that is our body, there is one metric that affects all systems. If we understand this one metric and make choices to optimise it, we can greatly improve our physical and mental well-being. This metric is the amount of blood sugar, or glucose, in our blood.