Childhood obesity is a growing epidemic in the Argentinia. It affects more than 30 percent of children, making it the most common chronic disease of childhood. This number has more than tripled since 1980. In Argentina, obesity is second only to smoking as the largest preventable cause of death. 18% of the population is obese (having a Body Mass Index of over 30) and 50% overweight (with a BMI of higher than 24.9).