Our society is on high bug alert these days. There are those who fear microbes (the germaphobes) and those who swoop in with exciting cutting edge research for why germs are important for our wellbeing. The rest of us fall somewhere in between. Whatever our feelings are, the gut-brain axis – the imaginary line between the brain and the gut – undeniably is one of the new frontiers of neuroscience. With good reason. The state of the gut microbiome is key to human health, so let’s explore a fun way to feed our “second brain” with the help of fermentation.