The diet and weight-loss industry is worth $66 billion - billion The estimated annual health care costs of obesity-related illness are 190 billion or nearly 21% of annual medical spending in the United States. But how did we get here? Is this a battle we can't win? What changes need to be made in order to scale back the incidence of obesity in the US, and, indeed, around the world? Here, Jonathan Engel reviews the sources of the problem and offers...