Does what you eat affect how you feel? Can changes in diet bring about changes in mental health? What impact on stress did supplements have on Christchurch people after the earthquakes or mosque attacks? Dr Julia Rucklidge, Professor of Clinical Psychology at UC, has spent decades looking at the nexus between nutrition, anxiety, depression and stress. She speaks with Zara Potts about her book The Better Brain, and why we need to be mindful of what we eat.