A friend of mine's DD was doing poosplosions and all sorts of gassy delights, so the Dr got her to start by eliminating all cruciferous veggies and bulb veggies ... so no cabbage, cauliflower, broccoli, brusselsprouts, and no onions, turnips, garlic, etc.

I think dairy and then wheat were after that.

I think each stage went for two weeks ... ?