However, the level of these health-promoting gut bacteria decreased again over the following four weeks. “It may be that four weeks of treatment is not long eno

However, the level of these health-promoting gut bacteria decreased again over the following four weeks. “It may be that four weeks of treatment is not long enough and that it takes longer for the new composition of the intestinal flora to stabilize,” explains Anna-Chiara Schaub, one of the lead authors of the study. Or maybe it's a moving target and people eat every day and their eating habits are part of why their gut is a mess to begin with.