Four words--high fructose corn syrup--describe an alarmingly ubiquitous sweetener that has the potential to make you into one chubby, sick puppy. You can find it in supermarket convenience food, canned goods, soda, juice and fast food. HFCS does nothing good for your body. But it's sweet and it grabs you in its sticky clutches. The intake of HFCS and table sugar, which also contains fructose, has risen to an average of 145 pounds a year per person. And not surprisingly, in part because of the obesity epidemic in the United States, HFCS has recently been the subject of much scientific research.