95% of your body's serotonin is made in your gut. Not your brain.
Your gut has 500 million neurons. It produces 30+ neurotransmitters. And 80% of the signals on the vagus nerve travel upward — from gut to brain, not the other way around.
In 2011, scientists transplanted gut bacteria from anxious mice into calm mice. The calm mice became anxious. In 2019, gut bacteria from humans with depression were given to germ-free mice — the mice became depressed.
Personality. Mood. Anxiety. Transferred through bacteria.
Right now, researchers are exploring "psychobiotics" — specific bacteria strains designed to treat mental health conditions. Vagus nerve stimulation is already FDA-approved for treatment-resistant depression.
We spent decades treating depression as purely a brain problem. But if 95% of serotonin is in the gut, maybe the most important breakthroughs in mental health won't come from neuroscience alone — they'll come from gastroenterology.
How does this shift your thinking about the connection between diet, gut health, and mental wellbeing?
Note: Put video link in first comment, not in post body.
Video: https://www.youtube.com/watch?v=qlaGKX9oMV0
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