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Fast food and BMI Fast food is associated with higher body mass index, less successful weight-loss maintenance and weight gain. Fast foods reduce the quality of diet and provide unhealthy choices especially among children and adolescents raising their risk of obesity.

Moreover, obesity/overweight was significantly associated with frequency of fast food consumption [5]. This study found the prevalence of obesity was higher in females, while the prevalence of fast food consumption was higher in males.

The simple answer is yes; fast food, sugar, portion size and obesity are intrinsically linked, and definitely the main sources of excess calories in contemporary diets. However, with plenty of healthy alternatives out there, obesity is also about choices, and it would be naive to place the blame solely on fast food.

Impact of junk foods on body weight High intake of fried foods and artificially sweetened drinks are found to be directly linked with high body mass index and obesity in children.

Fast food is associated with higher body mass index, less successful weight-loss maintenance and weight gain. Fast foods reduce the quality of diet and provide unhealthy choices especially among children and adolescents raising their risk of obesity.

Lifestyle issues — too little activity and too many calories from food and drinks — are the main contributors to childhood obesity. But genetic and hormonal factors might play a role as well.

As the CDC notes, “Consumption of fast food has been linked to weight gain in adults.” Poor nutrition choices with calorie-dense foods have also been linked to childhood obesity.

How close they live to a fast-food restaurant can have a direct impact on their chances of becoming obese, researchers found. The research team, led by Brian Elbel, found that 20 percent of children between the ages of 5 and 18 living within a half-block of a fast-food outlet were obese and 38 percent were overweight.