# What Causes Brain Fog? The Blood-Brain Barrier, Brain Inflammation & Cognitive Decline

Page: https://stenobird.com/podcast/the-goode-health-functional-medicine-longevity-autoimmune-6433631/what-causes-brain-fog-the-blood-brain-barrier-brain-inflammation-cognitive-decline
Text version: https://stenobird.com/podcast/the-goode-health-functional-medicine-longevity-autoimmune-6433631/what-causes-brain-fog-the-blood-brain-barrier-brain-inflammation-cognitive-decline.md
Podcast: [The Goode Health: Functional Medicine, Longevity & Autoimmune](https://stenobird.com/podcast/the-goode-health-functional-medicine-longevity-autoimmune-6433631)
Published: 2026-06-15T07:30:00+00:00
Episode link: https://www.nicolegoodehealth.com
Audio file: https://episodes.captivate.fm/episode/d3bda06b-656e-4461-b9af-c1fbd72cfd58.mp3
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Duration seconds: 1452

## Resource

If you’ve been struggling with brain fog, fatigue, poor concentration, or memory issues and you’ve been told everything looks “normal,” this episode will help you understand what may actually be going on beneath the surface. We explore the emerging science behind the blood-brain barrier, a protective system that shields your brain from inflammation, toxins, and immune activity in the rest of the body. When this barrier is functioning well, your brain operates with clarity and stability. But when it becomes compromised, it may allow inflammatory signals, immune activity, and metabolic stress to affect cognitive function, potentially contributing to brain fog, fatigue, mood changes, and long-term cognitive decline. 02:00 — Why the brain is different from the rest of the body 06:10 — What is the blood-brain barrier? (Your brain’s protection system) 08:20 — The 3 main pathways to brain inflammation 11:55 — A “leaky brain” barrier matters more than you think 14:30 — What weakens the blood-brain barrier 17:10 — Can the blood-brain barrier heal? 3 mechanisms of support 21:20 — Gut health, gluten & molecular mimicry explained RESOURCES: Grab all the links and resources mentioned in this episode at https://www.nicolegoodehealth.com/the-goode-health-podcast/episode-129 DISCLAIMER: The content in this podcast and related website is not intended to be a substitute for medical advice. It is not intended to be used to diagnose or treat, instead it is designed to help educate and inspire. Always seek the advice of a professional medical practitioner or qualified health practitioner. Never ignore or disregard advice given to you based on information in this podcast or related website and do not delay in seeking medical advice.

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