Not all sugars are created equal, and research shows that eating a certain type of sweet stuff can make you gain weight at an alarming weight. We're talking about Fructose, not to be confused with naturally-occurring glucose. According to the New York Times, regular sugar is normally processed by the liver, which acts as a sort of 'traffic cop' and directs the sugar where to go. But fructose by-passes the liver and heads straight to your hips in the form of unhealthy fat.
I know what you're wondering: Why would anyone eat fructose? The answer is simple -- it's everywhere. It's cheaper than sugar, so many food manufacturers use it. It's your responsibility to read the labels and make sure you're avoiding this tasty poison.