Americans have become fatter in the past few decades and the main reason is the changing food habits, claims a study.

According to a government survey, which was done in mid-2000s, the intake of the calories in the adults has increased by one-third since the late 1970s. The average intake of calories by an individual was calculated which was around 2,375, in the mid-2000s.

According to the study, over the past three decades, 29% rise is seen. Earlier, the Americans consumed an average of 3.8 snacks and meals per day but, now it has risen to 4.9 snacks and meals per day.

University of North Carolina Nutrition Professor, Barry Popkin said that the Americans are eating often and this is the real reason behind the increase in the intake of calories. He blamed the food advertising industry for this rise.

“Nowadays, everywhere you turn there's food. If you're driving, you have a big bag of Doritos next to you while you drive", he said. According to him, the generation is full of constant eaters.

Yale University Prevention Research Center Director Dr. David Katz “We joke about the 'see food' diet. We see food and we eat it". She confirmed that around one-quarter of adults in the United States are suffering from obesity.