And it's easy to fall into habits that contribute to weight gain. More of us are eating out more often.
Portion sizes are larger.
Low fat products are everywhere, and many people believe that low fat is healthy and therefore can be consumed freely without regard to quantity. Many Americans ignore calories and fail to get enough exercise. Another possible cause for the increase in obesity is Americans' obsession with fat in the diet and attempting to eliminate or reduce it by overeating low fat foods. However, many low-fat foods are actually higher in calories than regular fat versions. Physical activity counts too.