The Many Names of High-Fructose Corn Syrup - Starkel Nutrition The dominating contributor to sugar intake in the American diet is high-fructose corn syrup and often it's in foods that might not even seem "sweet.". Soda is a common source but it's also added to many processed foods including condiments like ketchup, salad dressings, crackers and even bread. The big problem with high-fructose corn ...