According to a recent article, “Fast Food Offerings in the United States in 1986, 1991, and 2016 Show Large Increases in Food Variety, Portion Size, Dietary Energy, and Selected Micronutrients” in the Journal of the Academy of Nutrition and Dietetics, the last 30 years have seen a broadly detrimental change to their offerings. In the categories of portion size, energy (kilocalories), and sodium content increased significantly. For more on this topic, see the New York Times Upshot article “Bigger, Saltier, Heavier: Fast Food Since 1986 in 3 Simple Charts available here and the abstract is available here. It is recommended that additional research focus on how to help consumers reduce energy intake from fast-food as part of an overall approach to improve dietary connected health issues in the U.S.