A pattern of gas and bloating may be an indication that a tumor is growing, especially if it worsens or is accompanied by bleeding. While the formation of a tumor may not be enough to cause a total obstruction, the increasing pressure placed on the colon walls can cause distress and even cramping in the upper intestinal tract.
The more general term glucose syrup is often used synonymously with corn syrup, since glucose syrup is in the United States most commonly made from corn starch.
Commercial production of corn syrup began in 1864. In the late 1950s, scientists at Clinton Corn Processing Company in Iowa tried to turn glucose from corn starch into fructose, but the process was not scalable.