Kazbern
The argument made by SCD is that is does change the flora. SCD argues that is starves the bad flora out and that is why fanatical compliance is critical. Even a few grains of the stuff that bad flora feeds on will allow the bad flora to flourish. This is how to take the bad flora out.
We also eat SCD yogurt that is made with not greater than 4 bacteria of the good stuff. This has about 1 trillion per cup. I eat two cups per day. This is how to get the good stuff in. I also compliment this with lacto fermented food including pickles, mayonnaise and other stuff. This is also how to get the good stuff in.
In addition to changing the gut flora by the above, SCD eliminates foods that frequently cause issues like, grain, rice, all sugers except honey...
So it seeks to do both, eliminate troublesome foods and have good bugs in your guts.
I really am looking forward to the Rush study and really hope it tells a clear story.
Dave