Teenage depression, Choir, Heart failure, Protein shakes

In Inside Health, Mark Porter clarifies recent headlines claiming that researchers have found a "Blood test that identifies depression". It certainly isn't that simple. GP Margaret McCartney reports from Paisley Abbey in Glasgow on the health benefits of joining a choir.And do special muscle building drinks live up to the marketing hype? Max Pemberton looks at the science behind the recent explosion in sales of high protein sports drinks.Plus a new treatment for helping people with fluid retention due to heart failure, that can transform a puffy face to a chiselled jaw bone overnight.Producer: Erika Wright.