To be fair, I think the parent is that they expect that both are affected in similar ways. That is, gut biome is an effect, not an affect with regard to mood.

To be fair, I think the parent is that they expect that both are affected in similar ways. That is, gut biome is an effect, not an affect with regard to mood. The sibling point that treatments targeting the biome would be expected to fail, if that were the case, is complication.