What is the most hazardous of all sweeteners?

Corn is in almost everything we consume. It is the primary food for the chicken, pigs, and cows we eat; the source of corn oils found in many snack foods, margarines, and baked goods; used to make high-fructose corn syrup, the most prevalent, cheapest and, some believe, most hazardous of all sweeteners; and the source of numerous food additives. As a result, corn is found in things that come out of our bodies, too. Like the one you're working on right now.