We live in an age of upgrades. We expect our broadband to be lightning fast, our TV to be high definition – and our food to be super. Search for the word “super” when doing an online grocery shop and you’ll be faced with an array of super berries, super seeds and super grains. Their selling point is not so much their taste but the extent to which they will enhance your health if you consume them, from increasing your muscle mass to reducing fatigue or prolonging your life. Such qualities are not mere add-ons, like cereals fortified with vitamins. Instead, the powers that a superfood offers apparently come from a force deep within it.