People overeat. And people dont always make the healthiest food choices. That much is clear. But who is to blame for overeating and poor food choices? And can we do anything about it?
Impact Of The Food Environment
Many health experts point the finger at the food industry for creating an obesogenic food environment. The argument, in essence, is that the current food environment makes it almost impossible for most people to make reasonable choices about their food intake.
Larger portions, for instance, encourage us to consume more calories. Even animal studies show that mammals from monkeys to mice will become obese if placed in an environment where they can eat as much appetising food as they like.
So, if the food environment is the problem, then modifications to that environment should help people make better, healthier food decisions.
One challenge is that efforts to make large-scale changes often meet with fierce resistance. We saw this with former New York mayor Michael Bloombergs failed attempt to limit the size of soft drinks sold in the city.
Other approaches provide more subtle means to help people make healthy (or healthier) choices, such as requiring restaurants to provide calorie information on their menus.
But while menu labelling sounds like a good idea, unfortunately, it doesnt work. It doesnt appear to have any consistent effect on peoples food choices or food intake, and may even backfire in some cases, leading to more unhealthy choices.
Why do these types of environmental approaches often fail? One possibility is that, in the end, they leave the responsibility to the consumer to make the right choices, and consumers are not well equipped to do so in the current food environment.
Self-control can be thought of as ones willpower and some people might just be better at resisting temptations than others.
If thats the case, then perhaps the solution is to train people to become better self-regulators. There is evidence that peoples self-control can indeed be improved through training.
There are, however, a number of problems with blaming these issues on lack of willpower.
First, its not the case that the food environment affects only individuals who are overweight or obese. The food environment shapes everyones eating, and portion size appears to have less of an impact on individuals who are overweight.
Second, if willpower involves consciously resisting temptation, its hard to see how it could help with environmental influences that may be outside our conscious awareness. People dont seem to be aware that the environment has influenced them. They may not even be aware they have overeaten.
A New Normal
A better solution and one that could potentially bypass the need to focus on individuals self-control is to focus on changing what people perceive as normal behaviour.
Researchers have found that environmental cues influence what people view as appropriate. People eat more from large portions because the portion size tells us its OK to do so. And people eat less when eating with someone else who eats very little because their eating companion provides a signal for when to stop eating.
How we can shift norms of food consumption?
Small changes to the environment can play a significant role in shifting norms. We have shown that segmenting a portion of food into smaller sub-units (such as three smaller cookies instead of one large cookie) leads people to eat less because the segments create a smaller consumption norm.
We found that providing clear information about the number of servings contained in a portion of food can reduce the portion-size effect, presumably because it adjusted peoples perceptions of the norm (although we didnt directly test that in this particular study).
We have also found that efforts to change consumption norms are likely to be most effective when they are seen as being by us and for us.
These normative changes seem small, but have powerful consequences for how we eat. In bypassing the need to worry about peoples self-control, they may be particularly effective as strategies for healthier eating.
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