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Finally, someone has studied the impact of portion size on America's rising obesity and found a definite link between super-sized fries and our growing thighs.
The study, in the Journal of the American Medical Association, says serving sizes have increased sharply both inside and outside the home. Researchers analyzed data from national surveys conducted between 1977 and 1998 and including more than 63,000 people age 2 and older.
To wit: The serving size of an average soft drink increased from 13 ounces and 144 calories to nearly 20 fluid ounces and 193 calories. The average cheeseburger grew from 5.8 ounces to 7.3 ounces, swelling from 397 to 533 calories.
And salty snacks grew from 1 ounce to 1.6 ounces, climbing from 132 calories to 225 calories.
The largest portion sizes were found in fast food restaurants between 1994 and 1998, but for desserts, hamburgers, and cheeseburgers, the largest portion sizes were dished out at home.
If you still need some motivation to scale back, consider this: An additional 100 calories a day can translate into 10 extra pounds a year.