EDS, POTS & MCAS: the Trifecta

Many people living with Ehlers-Danlos Syndrome (EDS), Postural Orthostatic Tachycardia Syndrome (POTS), and Mast Cell Activation Syndrome (MCAS) find these conditions overlap significantly. This is sometimes called the trifecta, although has been expanded to include both gastroparesis and autoimmunity where relevant. Other conditions / symptoms that frequently occur include ADHD, chronic fatigue and persistent pain.

What is the trifecta?

EDS is a connective tissue disorder affecting collagen, causing joint hypermobility, pain, and tissue fragility. POTS is a form of dysautonomia causing heart rate spikes, dizziness, and fatigue on standing. MCAS involves mast cells releasing inflammatory mediators inappropriately, triggering wide-ranging symptoms including rashes, gut issues, and anaphylaxis-like reactions.

These three conditions co-occur far more often than chance, likely due to shared connective tissue, autonomic dysregulation and immune dysfunction

What I see often is frustrated clients that haven’t met the criteria for all or some of the trifecta disorders but are still suffering the results of dysautonomia, hypermobility and histamine intolerance.

Why do they occur together?

Lax connective tissue in blood vessel walls can impair circulation and contribute to POTS. Mast cells are embedded in connective tissue, and dysfunction here may drive both local and systemic inflammation. The exact mechanisms are still being researched, but autonomic dysfunction, neuroinflammation, and connective tissue fragility appear to be the common threads.

What does naturopathic support look like?

•       Nervous system regulation to support autonomic function

•       Targeted nutrients to support connective tissue integrity and immune dysregulation

•       Low-reactivity nutrition approaches and mast cell stabilising strategies

•       Gut microbiome support, which is frequently dysregulated in all three conditions

•       Collaborative care with your medical team

Can nutrition and lifestyle actually make a difference?

Yes, meaningfully so. The symptom burden is highly modifiable. Blood volume, mast cell reactivity, vagal tone, and gut function all respond to targeted nutritional and lifestyle approaches. The key is working within your personal tolerance window rather than applying generic protocols.

Is this a condition you work with?

Yes. Complex, multi-system presentations are a core part of my practice. If you are navigating one or more of these diagnoses, or are still seeking answers, a thorough intake process will help map your individual picture before any recommendations are made.

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