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The first law of home economics states that the amount of food in a supermarket trolley rises in direct proportion to the shoppers hunger level. supermarket trolley 超市购物手推车 be in direct proportion to 与成正比 But while the danger is well known to shoppers who venture out on an empty stomach, how the problem arises in the brain has remained a mystery. venture out 探险;冒险出去 In a new study of hungers effects on the mind, neuroscientists pieced together what happens in the brain that makes us buy more food when we are famished. effect on 对的作用 piece together 拼凑;七拼八凑 The findings point to ways of overcoming the temptations of the food aisles and throw fresh light on the rise of obesity over the past 30 years. throw light on 使显得清楚;阐明 From a series of brain scans on volunteers, the researchers showed that a hunger hormone triggered activity in the brain that made people pay more for junk food than usual. Equipped with this knowledge, shoppers should be able to override the urge and stick to more healthy shopping, the scientists said. You should never make decisions about food when you are starving. When you go to the supermarket hungry, the food you are drawn to is high-calorie junk food, said Dr Alain Dagher, a neurologist at the Montreal Neurological Institute. You assign way too much value to calories and so way too little to health and other things. | 
