light bread starts turning into sugar almost instantly in the mouth and stomach. It's only one step removed and saliva can break it down quickly because it has amylase. Sour dough and whole wheat/grain breads tend to break down a bit slower. You can freeze bread overnight and make it a bit more "resistant" to breaking down quickly and I pretty much do this with all my breads along with toasting them a bit for sandwiches. Pasta can similarly have its glycemic index lowered by first making it "cold"
Do you mean that they need to be cold when they are consumed, or is it the process of freezing itself that does something, even if it's later reheated?
