A bitter pill - weight loss drugs explained

European weight loss drugs are proving to be popular. But for many they come at a hefty price. New Zealand is now producing its own weight loss drug. Calocurb has been developed at Plant and Food Research in Auckland, from a hop extract taking advantage of the bitter taste of hops. To tell us more about how they work, Anna is joined by Professor of Cell Signalling at the University of Auckland, Peter Shepherd.