An irrational fear of caffeine addiction turns some people against coffee, says Marcia Pelchat, a food researcher at Monell Chemical Senses Center in Philadelphia.

费城莫内尔化学药品识别中心的食品研究员玛西娅·佩尔沙说，有些人因为害怕咖啡因上瘾而拒绝喝咖啡，而这一想法是不合理的。

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"For most of human history, people didn't have enough to eat, so fat was something you really needed to seek out, " says Marcia Pelchat, a food psychologist at the Monell Chemical Senses Center in Philadelphia.

CNN: Train your brain to crave healthy foods