I think the idea is that the biome is built up over time and you can't always just eat your way to certain bacteria growing in your gut. I think the fecal tran

I think the idea is that the biome is built up over time and you can't always just eat your way to certain bacteria growing in your gut. I think the fecal transplants help to essentially seed your gut with healthy bacteria, which makes adapting to the proper diet easier when your body isn't constantly fighting you.