20 billion beneficial bacteria for cloudless weekdays! The fact that so many microorganisms living in our intestinal tract can positively influence our mood, well-being, and mental health is completely new information for the scientific world. We call them psychobiotics. The highly important beneficial strains of the human microbiome stimulate the Gut-Brain axis through the compounds they produce. An example is Bifidobacterium longum subs. infantis and B. longum or Lactobacillus casei and L. plantarum strains. _x000D_