Many elements have changed in the diets of people around the world, which have proven to be negative. The structure of diet has changed to one with higher fat and added sugar content. Other dietary changes have been the eating of fewer fruits and vegetables, and less fiber intake in what is eaten. The ultimate outcome of this negative shift in diet is obesity.

Dietary changes around the world are shifting to a more energy-dense and sweeter diet, leading to the burden of obesity around the world. Nutrient poor foods have high levels of sugar and saturated fat. Add the decrease in physical activity to the negative dietary changes and the result is extreme obesity in adults and children from all parts of the globe.

The fast food industry continues to grow around the world. As more and more fast food options have become available, many more people have moved from eating more nutritious food at home to eating out. Food prepared out tends to be much higher in saturated fat, which quickly leads to weight increase and obesity.