Yes, I believe that is what happens. On the other hand, my symptoms often seem to improve if I eat pizza for each meal for 24hrs (order one night, consume left overs for the next day). :)

Crohn's is one illness that attracts more than it's fair share of woo and 'special diets' and so on. As a result I've become fairly sceptical of any one-off scientific papers that make certain claims, whether they are related to auto-immune diseases or not.

Your skepticism is probably good, but fasting (and its semi-related brother, caloric restriction) has been the subject of scientific investigation for a long time, so 'one-off' hardly captures the essence of it.