That sugar craving might not be you. It could be your gut microbiome sending signals to your brain.
It sounds like science fiction, but it’s rooted in biology. Your gut and brain are in constant conversation via the “gut-brain axis,” a direct line of communication largely carried by the vagus nerve. The trillions of bacteria in your gut don’t just digest food. Some strains actually produce neurotransmitters, like serotonin (a key regulator of mood), and can influence your brain’s reward centers. ...