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June 06 2011
To Keep to Your Diet, Pretend You’re Constantly Breaking It
Is this milkshake better than yours?
Congratulating yourself on that calorie-conscious salad might just make you feel hungrier, scientists are now finding—better to close your eyes, take a bite, and pretend you’re eating ice cream.
We’ve already heard in recent years that eating imaginary M&Ms or cheese cubes can give you some of the satiety of the real thing: In a 2010 paper, researchers found that contrary to popular belief, imagining eating such foods in vivid detail actually made subjects eat fewer M&Ms, cheese chunks, and so on. Now, scientists have found that if you believe a shake is low in calories, you’ll feel less satisfied than people who think the shake was an indulgence, even when you’re both drinking the same shake. What gives?
The team (from Yale’s Rudd Center for Food Policy and Obesity) told subjects that a 380-calorie shake had either an indulgent 620 calories or a prudent 140 calories. Then they checked to see what effect that had on subjects’ blood levels of ghrelin, a hormone that triggers hunger and is high before meals and low after. They found that ghrelin didn’t subside afterwards in people who thought they ...
