Link: The Murky World of High-Fructose Corn Syrup.
There's a couple of other murky things that consumers should know about HFCS [high fructose corn syrup]. According to a food technology expert, two of the enzymes used, alpha-amylase and glucose-isomerase, are genetically modified to make them more stable. Enzymes are actually very large proteins and through genetic modification specific amino acids in the enzymes are changed or replaced so the enzyme's "backbone" won't break down or unfold. This allows the industry to get the enzymes to higher temperatures before they become unstable.
Consumers trying to avoid genetically modified foods should avoid HFCS. It is almost certainly made from genetically modified corn and then it is processed with genetically modified enzymes. I've seen some estimates claiming that virtually everything--almost 80 percent--of what we eat today has been genetically modified at some point. Since the use of HFCS is so prevalent in processed foods, those figures may be right.
