Obesity has been linked to the development of multiple cancers, and to poorer prognoses and higher mortality rates for certain pediatric and adult cancers. Preventing obesity is therefore a major strategy to prevent new cases of cancer and to decrease cancer related morbidity and mortality. In the US, childhood obesity is on the rise. Since childhood obesity strongly tracks into adulthood this epidemic among children greatly increases the risk of obesity and presumably cancer in adulthood. As a result, preventing childhood obesity has been selected as a major public health goal to reduce the risk and sequelae of obesity and cancer in the US.