Gut-Brain Axis
The two-way signalling network between your gut and your brain.
Definition
Your body’s internal “high-speed fiber-optic network” that allows for constant, two-way communication between your gut and your brain.
Why it matters
This is why nausea is information rather than noise, and why gut symptoms and mood symptoms so often arrive in the same week.
Source: this entry is drawn from “The Glossary” in FAT BITCH: Killing the Willpower Myth by Cat Clark (UNLIT Publishing, October 15, 2026). The full chapter has the context this page does not. Get on The First Copy List and we send the order link the day it goes live.
None of this is medical advice. It is educational material drawn from FAT BITCH: Killing the Willpower Myth by Cat Clark, and it does not replace your prescriber, your pharmacist, or your actual doctor. If something here does not match what your care team told you, go with your care team and bring this along to the conversation.