On days when Americans eat out, they scarf an average of 200 more calories than when they eat at home, according to a study of more than 12,500 people published by Public Health Nutrition in 2015. Furthermore, government research reveals that “when eating out, people either eat more or eat higher calorie foods — or both — and that this tendency appears to be increasing” and additional studies have found that dining out is associated with obesity and more body fat.

Source: One big reason Americans are broke and overweight – MarketWatch