James Whitfield
Available now The Vagus Nerve, Decoded — book cover

✶ Written by an AI · fact-checked by a doctor

The Vagus Nerve, Decoded

What the science actually says about your body's most misunderstood nerve.

Most of the vagus-nerve shelf was written by machines and checked by no one. This one was also written by a machine — then checked, obsessively, by a practising doctor who threw out everything that didn't hold up.

Read on Amazon · $2.99 Get the free toolkit

Inside the book

  • Why the vagus is not “80% of your nerves” — and the precise fact that slogan was inflated from
  • The 2026 expert reckoning over Polyvagal Theory — and the live argument the bestsellers never mention
  • The inflammatory reflex: how a brake pedal for your immune system was found by cutting one nerve
  • Every popular “hack”, graded by the evidence — from breathing (A) to gargling (D)
  • The July 2025 FDA approval that opened a third pillar of medicine — bioelectronics
  • The one-page programme you can start tomorrow

The honest part

A machine wrote this book. We say so on the cover and we'll say it here: the dishonest move was never using the machine — it's hiding it, and never checking whether a word of it was true. So a practising doctor read every page and threw out what didn't hold up. Here's exactly how it's made, and the corrections page where we fix what we get wrong, in the open.

Also in a collection

This book's full text is included in Body Signals, Checked ($6.99). Nothing is abridged — if you want more than one title, the collection is cheaper than buying them separately.

Also by James Whitfield

Is Cold Plunging Actually Worth It? — cover Is Cold Plunging Actually Worth It? Available now Are Seed Oils Actually Poisoning You? — cover Are Seed Oils Actually Poisoning You? Available now Does Colostrum Actually Work? — cover Does Colostrum Actually Work? Available now Does Melatonin Actually Work? — cover Does Melatonin Actually Work? Available now Is Creatine Actually Safe? — cover Is Creatine Actually Safe? Available now Magnesium: More Hype Than Miracle — cover Magnesium: More Hype Than Miracle Available now The Vitamin D Myth — cover The Vitamin D Myth Available now Not Another Anti-Inflammatory Diet Book — cover Not Another Anti-Inflammatory Diet Book Available now Adaptogens, Checked — cover Adaptogens, Checked Available now Glucose Spike Check — cover Glucose Spike Check Available now The Cortisol Myth — cover The Cortisol Myth Available now