Corn is definitely not the same thing as maltodextrin. The GI of corn varies depending on the variety, the ripeness and how long it's been stored since picking, but usually doesn't go over 70. High fructose corn syrup can also be derived from corn, but it is also not the same as eating corn. It's kinda like asking if eating cheddar cheese is the same as using whey protein hydrolysate if ya know what I mean. They both come from milk, but are nutritionally very different......