I know I can't just have one Chip, Cookie, Fruit Roll Up-haha! But Scientists say there is a reason why it is nearly impossible for a person to eat just one potato chip or cookie.
Doctors say sugar, salt, and fat bypass our normal fullness mechanisms, which is why you can eat a full bag of chips without feeling full.
Food manufacturers don't make it any easier for us, they spend millions each year trying to find the perfect blend of sugar, salt, and fat to keep us wanting more.