Size Matters for Healthy Eating

Size Matters for Healthy Eating

Tips for keeping portion sizes under control

Nutrition & Movement

When we eat too much, it's because the food tastes so good we can't resist it, right?


That's what most of us believe. Yet other factors, such as food container size, influence the portions we take and may promote over-eating. A recent study from Cornell University shows that the visual cues we get from large-sized packages or bowls so strongly influence our eating behavior that we consume more food—even when we don't like how it tastes!

The study tested popcorn container size. Moviegoers were given free popcorn, in either a medium- or large-sized bucket. At random, some people received popcorn that was fresh; others had containers holding stale (14-day-old) popcorn. (Freshness is key to popcorn tasting good.)

When the popcorn was fresh, the subjects ate 45.3 percent more from a large bucket than a medium one. More remarkably, even though most moviegoers given the stale popcorn rated it as tasting awful, those with large buckets of the stale stuff still ate 33.6 percent more than those eating it from medium containers!

Other than being skeptical of free popcorn offered by strangers, here are some take-away hints from the study's findings:

  • Be careful about container size as well as portion size. Most of us aren't good judges of how much we're eating from larger containers, according to study co-author Brian Wansink, Ph.D., a Cornell professor of applied economics, nutritional science and marketing.
  • If you don't particularly like the taste of a food, a large container of it might still encourage you to eat more. Be aware and don't just munch mindlessly.
  • You can increase consumption of more healthful foods for you, your family, or your friends, by serving low-calorie, nutritious foods in larger containers. Put raw baby carrots and red pepper strips, or fresh fruit slices, in a big bowl. Everyone is likely to eat more of them when served that way.
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