Gas build-up and pressure may be caused by a number of other issues as well. Other common causes include, but are not limited to: The most serious health conditions connected to bloating are: ovarian cancer, uterine cancer, colon cancer, stomach cancer, pancreatic cancer, liver disease, and pelvic inflammatory disease.
dextrose (glucose), fructose. Dextrose (also known as glucose or corn sugar) and fructose (fruit sugar) are simple sugars that are often made from corn. Dextrose is used in a variety of foods, including cookies, ice cream and sports drinks such as Gatorade.
High fructose corn syrup contains fructose. Regular corn syrup is nearly all glucose. Corn syrup is just glucose syrup made from corn: http://en.wikipedia.org/wiki/Glucose_syrup. So the answer to the OP's question is: none, really, except that you can make glucose syrup from other sources of starch as well.