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Your support makes all the difference.Nearly one in five dishes served at US restaurants has at least 100 more calories than advertised, a difference that could pack on up to 15 kilograms (22 pounds) per year, said a study on Tuesday.
While most of the 269 foods measured at random in the three-state survey were close to the calorie count listed on the menus, some varied wildly, such as one order of chips and salsa totaling 1,000 more calories than expected.
That finding, while "not typical... is an amount that is nearly half the total daily energy requirement for most individuals," said the study led by Lorien Urban of Tufts University and published in the Journal of the American Medical Association.
Salads, as well as high-carbohydrate dishes containing rice, beans, potatoes or bread, tended to have "significantly more variability," while sandwiches and meat dishes were more likely to remain near or below the advertised calories, said the study.
In a country where obesity has risen to 34 percent of the population and up to 35 percent of the average person's calorie intake comes from food eaten out instead of at home, the findings point to a potential source of a nationwide epidemic.
For instance, with 19 percent of the food coming in at 100 calories higher than advertised, a person who regularly consumed that additional amount daily would be projected to gain five to 15 kilos (11-33 pounds) per year, it said.
"The prevalence of obesity remains at epidemic levels and national recommendations emphasize reducing energy intake to facilitate weight loss and prevent weight gain," said the study.
"However, the extent to which this recommendation can be implemented depends in part on the accuracy of available information on the energy contents of foods that are typically consumed."
Food were sampled from the states of Indiana, Massachusetts and Arkansas from January to June 2010.
Among the restaurants sampled were Arby's, Chuck E. Cheese, Old Spaghetti Factory, P.F. Chang's China Bistro, Chili's Grill and Bar, and Bob Evans.
At Denny's, a popular chain diner, a sampling of the french fries showed they had 122 more calories than advertised, while the classic hamburger actually had 152 fewer calories than advertised.
Sit-down restaurants tended to show greater differences in actual versus advertised calories when compared to fast-food establishments, possibly due to lack of portion control, the authors said.
The US government is currently finalizing plans to make menu calorie counts mandatory in chain restaurants, a change that comes as part of President Barack Obama's health care law passed last year.
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