Did you know that even mild dehydration can have damaging effects to your cognition, mood, and physical and mental performance? But drinking litres of plain water every day isn’t necessarily the solution. In this episode, Michael debunks the many myths about how much water we should drink, and enlists the help of Dr Stuart Galloway, professor in exercise physiology from the University of Stirling, to reveal how much water we need, how to avoid the negative effects of mild dehydration, and how drinking water with every meal may even help to lose weight.