The science is clear: you are what you eat. Nothing affects your weight more than the food that you’re eating, and the key to controlling your weight is controlling what you eat. The two biggest food problems for American diets are quantity and quality.
Portion sizes in America have been increasing since the 1970’s, and surprisingly so. A study in the American Journal of Public Health found that the average daily calorie intake per person increased by 500 calories between the 1970’s and early 2000’s.
The study blames the increase in caloric intake on two causes. First, Americans have been eating out more. Dining out as a percentage of the American food budget has increased from 34% in the 1970’s to nearly 50% now. Restaurants, especially fast food and takeout establishments, tend to serve foods high in fat, sugar, and salt, which taste great, but are high in calories and terrible for your waistline.