Huh, that's interesting. I wonder what effect this has on the gut and what advantage this confers to the bacterium. AFAIK, dopamine doesn't cross the blood-brai

Huh, that's interesting. I wonder what effect this has on the gut and what advantage this confers to the bacterium. AFAIK, dopamine doesn't cross the blood-brain barrier, so it can't (directly) have an effect on the brain's dopaminergic pathways, but who knows what it does to the gut, or follow-on effects on the brain.