Whole wheat products need to be eaten with caution and High fructose corn syrup is an IBS trigger. You should try white french, or sourdough bread. If you have glycemic problems you'll need to find SF foods low in sugar like quinoa, yams, avocados, etc
I just read an article by Dr. Perricone and he said that from 1970 - 1990 HFCS consumption has risen 1000 percent. Prior to the 1970's this product did not exist and the rise in consumption corresponds closely with the sharp rise in obesity rates seen in recent years.