Dr. Andrew Huberman discusses how gut-produced serotonin signals through the vagus nerve to the brain, raising brain serotonin levels and improving mood and overall well-being. Dr. Andrew Huberman is a tenured professor of neurobiology and ophthalmology at Stanford University School of Medicine and host of the Huberman Lab podcast. Watch the full episode: Show notes: *Timestamps* 00:00 Serotonin & Wellbeing 00:21 Serotonin Production in the Gut 00:53 Communication to the Brain 01:30 Enterochromaffin Cells & Tryptophan 03:10 Impact of Gut Serotonin on Brain Function 04:29 Gut Health & Serotonin Levels 04:43 Dietary Recommendations for Gut Health 07:07 Probiotics & Mood Improvement 07:50 Scientific Evidence & Clinical Trials Disclaimer & Disclosures: