From a series of brain scans on volunteers, the researchers showed that a hungerhormone triggered activity in the brain that made people pay more for junk food than usual.
通过对志愿者大脑的观察，研究人员发现饥饿激素能够刺激大脑活动，人买的垃圾食品比平常要多。
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It also appears to lower levels of ghrelin, the 'hungerhormone', circulating in the digestive system.
同时人体中一种在消化系统循环中被称为“饥饿激素”的物质的水平也有明显的下降。
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These kinds of meals increase levels of leptin, a hormone that decreases hunger (and boosts fat burning) and lowers levels of ghrelin, a hormone that increases hunger.