Ghrelin seems to increase the amount you are willing to pay for food through this area of the brain. We think this is why you assign greater value to the food when you are hungry, Dagher said. The research was presented at the Society for Neuroscience meeting in Washington DC.
But the study found that people did not simply pay more for foods they liked. Instead, the higher bids were for the high-calorie junk foods.
When you are hungry you assign way too much value to calories and so way too little to health and other things, Dagher said.
Dagher believes that simply being aware of the way the brain works could help people overcome the urge to buy junk food when they are hungry. We have this intrinsic value system but we can override it with our minds, he said.
The findings support evidence that shows skipping meals to lose weight can be counterproductive. If you miss meals, you tend to gain weight because you get hungrier and eat calorically dense foods, Dagher said.
skip meals 不吃饭
counterproductive adj. 起反作用的;使达不到预期目标的
calorically dense food 高热量食物
The main reason for the increase in obesity over the past 30 years is the cost of food. When you look at an item of high-calorie food, its cost is low, so youre more likely to buy it. And once you have bought it, you are more likely to consume it.
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