How can wheat & sugar have such a bad effect so quickly?

Q) This is a request for information really but linked to the above. i started your diet about five weeks ago and have made slow but steady progress – lost 7.5 lbs and have about another 5 to go. I think wheat is my big problem, probably all carbs though. This weekend we were away and i wasnt really able to avoid white flour ingredients – i had a very small piece of my hosts ginger cake on saturda...