Soda
Original 8-ounce bottle 12 ounce can 20-ounce bottle
97 calories 145 calories 242 calories
While the 12-ounce can used to be the most common soda option, many stores now carry only the 20-ounce plastic bottle, which contains 2.5 servings of soda. When presented with these larger sizes, humans have a hard time regulating our intake or figuring out what a serving size is supposed to be. A 2004 study, published in Appetite, gave people potato chips packaged in bags that looked the same, but increased in size. As package size increased, so did consumption; subjects ate up to 37 percent more with the bigger bags. Furthermore, when they ate dinner later that day, they did not reduce their food consumption to compensate for increased snack calories—a recipe for weight gain.
Plates
It’s not just food portions that have increased; plate, bowl, and cup sizes have as well. In the early 1990s, the standard size of a dinner plate increased from 10 to 12 inches; cup and bowl sizes also increased. Larger eating containers can influence how much people eat. A study published in the American Journal of Preventive Medicine found that when people were given larger bowls and spoons they served themselves larger portions of ice cream and tended to eat the whole portion.
Prices
32 ounces 44 ounces 64 ounces
388 calories 533 calories 776 calories
$0.99 $1.09 $1.19
We Americans love to get the most bang for our buck. When confronted with a 32-ounce drink for 99 cents versus a 44-ounce drink for ten cents more, the decision is easy. You’d have to be a sucker not to go big. But our ability to get the most out of our dollar doesn’t always serve us well. Value pricing, which gets us a lot more food or drink for just a little increase in price, makes sense from an economic standpoint, but is sabotage from a health standpoint. A study published in the Journal of the American Medical Association found that Americans consume around 10 percent more calories than they did in the 1970s. Given no change in physical activity, this equates to around 200 extra calories per day, or 20 pounds a year.
What is normal?
Increased portion sizes give us more calories, encourage us to eat more, distort perceptions of appropriate food quantities, and along with sedentary lifestyles, have contributed to our national bulge. Unless you’re trying to gain weight, it might help to reacquaint yourself with serving sizes. The NHLBI tells us that a serving of meat should be the size of a deck of cards while one pancake should be the size of a CD. It’s unlikely that we’ll see a scaling down of food to these sizes anytime soon, so perhaps we should all become familiar with another image: the doggy bag.
