The gut–brain axis explains something most mental health models miss.
In this episode of The Vital Spirit Podcast, I begin a two-part essential series on the gut–brain axis — the communication network between the gut, brain, immune system, hormones, and metabolism that shapes mood, stress resilience, and inflammation.
In Part 1, we explore why mood symptoms — including depression — often emerge during periods of chronic stress, immune activation, hormonal shifts, or gut dysfunction, even when life looks “fine” on the outside. This episode lays the biological foundation for understanding how the body enters survival states, and why healing requires working with physiology, not against it.
In this episode, we cover:
01:03 Why mood symptoms need a new biological framework
01:34 What the gut–brain axis is and why it’s foundational to healing
02:22 How the gut and brain communicate through neural, immune, endocrine, and microbial pathways
08:10 The vagus nerve and why your gut sends emotional signals upstream
10:54 Immune signaling, inflammation, and “sickness behavior”
13:15 Hormones, blood sugar, cortisol, and metabolic pathways
15:08 Microbial metabolites, short-chain fatty acids, and neurotransmitter terrain
19:52 Clinical examples that show why mood and gut symptoms are inseparable
21:30 Why this matters — and what’s coming in Part 2
Links and resources:
- Join Calm Gut, Clear Mind: A 21-Day Journey to Restore Your Gut, Balance Your Hormones & Soothe Your Nervous System: https://drkellylivingston.com/gutreset/getting-started
- Listen to Episode 4. Why Healing Your Gut Is the First Step to Hormone Balance: https://player.captivate.fm/episode/47733e90-298c-4bfb-bd76-46b443dd26a4/
- Listen to Episode 6. What Happens in Vagus: The Missing Link to Resilience, Digestion & Hormone Balance: https://player.captivate.fm/episode/b278c36f-eb4e-4004-9cea-44bd78a8db8e/
- Listen to Episode 15. Inflammatory Depression: What’s Really Behind Low Mood in Perimenopause: https://player.captivate.fm/episode/5abc8dca-592f-45c9-8c79-9d31e3327c62/
- Listen to Episode 43. What Depression Really Is and What It Isn’t: https://player.captivate.fm/episode/448f31be-d209-41f3-a5f5-9a33be355b34/
- Listen to Episode 45. How Depression Heals: The Therapeutic Order for Mind, Body, and Spirit: https://player.captivate.fm/episode/b16d549c-c78e-47b1-b6dd-17ae3f631d3f/
- Listen to Episode 41 Part 1. SSRIs, Serotonin, and the Truth About Depression: What Women Aren’t Being Told: https://player.captivate.fm/episode/eef0556d-c3cf-41e5-b944-ef8a3b8a3c8a/
- Listen to Episode 41 Part 2. SSRIs, Serotonin, and the Truth About Depression: What Women Aren’t Being Told: https://player.captivate.fm/episode/21b28c90-b987-4658-8429-87e06d3cc1ba/
Connect with Dr. Kelly:
Website: drkellylivingston.com
Website Clinic: rootsdeepmedicine.com
Instagram: instagram.com/thevitalspiritmethod/
Facebook: facebook.com/rootsdeepnaturopathicmedicine
YouTube: youtube.com/@DrKellyLivingston
Thank you so much for joining The Vital Spirit Podcast.
If you enjoyed this episode, don’t forget to subscribe, rate, and review the podcast as it helps us reach more women who are ready to awaken their healing potential.
Remember, healing isn’t a destination; it’s a journey. Every step brings you closer to the vibrant health you were born to experience. Let’s walk this path together.
If you’re ready to dive deeper or work with me one-on-one, visit www.drkellylivingston.com for more resources and ways to connect.
Disclaimer:
The information shared on The Vital Spirit Podcast is for educational and informational purposes only and is not intended as medical advice. The content reflects the opinions and experiences of Dr. Kelly Livingston, ND, and her guests, and is not a substitute for personalized care from a licensed healthcare provider. Always consult your doctor or qualified health professional before making changes to your diet, supplement routine, lifestyle, or medical treatment. Listening to this podcast does not establish a doctor-patient relationship.
