Coffee drinkers rejoice! Did you know that a simple cup of coffee can improve your mood, boost your workout and even stimulate your brown fat, helping you burn calories? In this episode, Michael Mosley finds out all the benefits of our beloved bean - with research suggesting that it could help your brain and heart. What’s more, if you time it right, a simple cup of coffee could help you get more out of your workout and could even change the way you break down fat. Michael speaks to Professor James Betts at the University of Bath to find out how much coffee is the best dose, and what to bear in mind when having a cup.