In Ireland approximately 25% of adults are obese and a further 35% of us are overweight. Between 1990 and 2011 the prevalence of obesity in 18-64 year old Irish adults increased from 8% to 26% in men and from 13% to 21% in women. Similar trends have occurred in children and approximately 25% percent of Irish children are overweight or obese. In work led by the School of Public Health in UCC, we conservatively estimated the costs of overweight and obesity on the island of Ireland in 2009 at €1.6 billion per annum. This includes both direct healthcare costs and indirect societal costs from disability, lost productivity and premature death. It does not include the effects of overweight on psychological well-being, social stigma and quality of life.