It's World Obesity Day, a health issue that affects almost one in three New Zealand adults.
Our childhood obesity rate is the third highest in the OECD, and that number looks set to rise if no serious action is taken.
Professor Jim Mann, a physician and Professor of Human Nutrition at the University of Otago, says New Zealand must strive to become a society with "better lifestyle choices".
"Clearly we have to be looking at what we can do for children and adults who are already obese, but really the only answer lies in prevention."
He spoke to Mark Sainsbury about our obesity epidemic.