Christchurch children are still suffering from anxiety two years after the earthquakes, a new study concludes.
Now, researchers at the University of Canterbury are looking at how vitamins and minerals can help treat psychological and psychiatric symptoms, including stress, mood and ADHD.
It's believed to be the first study in the world looking at micronutrients and anxiety in children.
While some children remain anxious or worried about earthquakes in particular, for others the events triggered worries about other things, says researcher Ellen Sole.
"The issue for a number of children experiencing anxiety is that the range of symptoms of anxiety can widely interfere with their development. This includes affecting friendships, school performance and a child's happiness," she said.