Kate travels to Morocco to see if saffron can beat the blues; downs espressos in Naples, to find out if coffee helps the liver; and runs a marathon on Ethiopian teff

Kate finds out if seaweed makes slimmer. Is blue cheese good for our stomach health? And will anyone buy the brand new superfood, Icelandic chork?

Kate Quilton tests the muscle healing properties of cherries when she touches down with US footballers, the New York Predators. She also chews through some very dark chocolate - could it really be good for our hearts? And finally, spinach - it worked as a superfood for Popeye, but does it really boost our biceps?