Based on intolerance it can be fast. I have Crohns disease but I have oral allergy syndrome and other food allergies. I am also lactose intolerant. If I have dairy I have delayed reactions to it even with pills to aid digestion in a few hours I have D. With my oral allergy syndrome it isnt abdominal issues it is hives, swelling in my mouth asthma flare etc. With my Crohns though my surgeon told me it can take up to 5 days or sooner based on if I am flaring what the item is etc. I can have flares with my crohns so badly that while eating I have to run and use the restroom. I know food allergies and intolerance can also cause things to have more rapid transit as one of my aunts has similar issues to me with foods (allergy wise) yet hers causes abdominal issues not the same type that I get
Dx with Crohn's 1987, symptoms as early as 1984.
Temp iliostomy February 2007, reversed June 2007, Ovarian cysts, migraines, allergies (incl food allergies) , oral allergy syndrome (diff than true food allergies), Asthma, Gall Bladder removed 1999, Inguenal hernia 1987
www.myspace.com/dragonfly137927