The headline is broadly defensible, but the qualifications matter. Effect sizes vary by population, the strongest claims rest on shorter trials, and credible voices push back on how it's typically framed.
And your dorsal raphe then releases serotonin in the brain. Again, a beautiful coordination of the body and the brain, just as activity levels in the body and the brain are matched through the vagus or from the brain to the body, depending on the direction of flow, right? Alertness in the brain, body becomes alert. Alertness in the body, brain becomes alert. Serotonin elevated in the gut, serotonin elevated in the brain. All of that happens by way of vagal signaling.
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Native comments, Twitter mentions, and Reddit threads about this claim — surfaced together so the conversation isn't fragmented across platforms.
Bookmarking — the dossier-vs-overview split is the right call. Most of the time I want overview; sometimes I want receipts.
Would love a "what would change this verdict" RSS feed. Sign me up if it exists.
Now, one of the most incredible things about the vagus nerve, that I myself have really not ever heard talked about out there, is the way it communicates and coordinates levels of serotonin in the gut, with levels of serotonin in the brain.