POTS, MCAS, and EDS: Why These Conditions Are Connected and How Functional Medicine Treats Them
Episode Summary
This is a deep-dive part two on the triad of dysautonomia, POTS (postural orthostatic tachycardia syndrome), MCAS (mast cell activation syndrome), and hypermobility/EDS (Ehlers-Danlos syndrome). Dr. Rose and Colin Renaud (DC, PA-C) explain how these three conditions are not separate diseases but different expressions of the same core breakdown, driven by autonomic dysfunction and systemic inflammation. The episode covers how conventional medicine siloes each condition into separate specialists, leaving patients with 50 doctors and no answers, and walks through how functional medicine builds foundational support while managing symptoms concurrently. Two patient case studies are shared, including a severe case involving home IV fluids stabilizing near-fatal dysautonomia episodes, and a post-COVID POTS case successfully rehabbed back to function.
Key Topics
- 1
Defining the triad: MCAS, POTS/dysautonomia, and hypermobility/EDS
- 2
How all three conditions share a common root: autonomic nervous system dysfunction driven by systemic inflammation
- 3
Why MCAS is likely the root of the triad, with inflammation from mast cells driving both connective tissue laxity and autonomic instability
- 4
How reducing inflammation can improve hypermobility (patients' joints literally tighten up)
- 5
The role of hormonal transitions (menarche, pregnancy, perimenopause, menopause) in triggering or worsening the triad
- 6
Why conventional medicine fails these patients: specialist fragmentation, gaslighting, and lack of training
- 7
GLP-1 medications (specifically tirzepatide) as anti-inflammatory, mast-cell-targeting tools for POTS and MCAS
- 8
IV hydration as a simple, low-cost stabilizing treatment for POTS
- 9
The difference between Med Matrix and primary care
- 10
Setting realistic timelines: healing takes months to years, not weeks
Quotable Moments
“POTS, EDS, and MCAS aren't separate diseases that happen to overlap. They're different expressions of the same core breakdown of the body, which is impaired regulation across the nervous system, the immune system, your vascular system, your connective tissue.”
“Some of my patients have 50 doctors for every symptom that is a manifestation of this triad. You've got a list of 50 people that you're seeing to try to manage essentially potentially one condition.”
“A big part of our job is just saying: I hear you, I understand you, and we have a lot to work on, but we can certainly do the work. Rather than, 'Get out of my office, you're fine, here's some Wellbutrin.'”
“Most patients in this world are medically traumatized. They've been in the ER 50 times. They've seen 50 specialists. They've been told they're making it up. Every time they don't get validated, it's just another trauma.”
“I had a patient, her dysautonomia was so bad that when she changed body position too quickly, she went into anaphylaxis. I had to administer six epinephrine doses to get her functional. We eventually got her home health IV fluids twice a week and it really started to stabilize her.”
Treatments Mentioned
FAQ
Dysautonomia FAQ
They are not separate diseases but different expressions of the same core breakdown involving impaired regulation across the nervous system, immune system, vascular system, and connective tissue. MCAS is likely the root, with inflammation driving both autonomic instability and connective tissue laxity.
Dysautonomia is dysfunction of the autonomic nervous system, which controls heart rate, blood pressure, breathing, digestion, and temperature. Symptoms include fainting, rapid heart rate, blood pressure drops, uncontrollable sweating, temperature dysregulation, and severe GI symptoms.
Yes. Multiple patients have experienced measurably less joint laxity after their systemic inflammation was reduced through MCAS treatment. When inflammation decreases, tendons, ligaments, and joint capsules tighten up, becoming more stable and less painful.
Hormonal transitions including first menstruation, pregnancy, postpartum, perimenopause, and menopause commonly trigger or worsen symptoms. The hormonal shift can be the tipping point that pushes an already dysregulated system into symptomatic expression.
IV saline can stabilize severe POTS patients rapidly. Even simple saline infusions improve blood volume and autonomic regulation. In one case, a patient whose dysautonomia triggered anaphylaxis was stabilized with twice-weekly home health IV fluids.
Realistic timelines range from months to years. Treatment involves foundational support (nutrition, sleep, hydration), short-term symptom management, and long-term root cause work in parallel. Setting honest expectations is critical to avoiding further medical trauma.
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