What Low T3 Has to Do With MCAS, POTS & Dysautonomia

What Low T3 Has to Do With MCAS, POTS & Dysautonomia

Brandy Searcy
Published on: 27/08/2026

Is there a connection between MCAS, POTS and dysautonomia? Low thyroid and low T3 may be an overlooked piece connecting mast cell activation, blood vessel function, orthostatic intolerance and cortisol.

Mast Cell Activation Syndrome (MCAS)Hashimoto's thyroiditis and low thyroid functionPOTS, Dysautonomia, and Orthostatic Intolerance
Low T3, Normal TSH, and Low Thyroid Symptoms: What’s Really Going On

Low T3, Normal TSH, and Low Thyroid Symptoms: What’s Really Going On

Brandy Searcy
Published on: 21/08/2026

This post discusses the intersection between low T3, inflammation, MCAS, POTS and dysautonomia and why looking beyond standard thyroid labs may reveal connections between symptoms that are being treated separately.

Mast Cell Activation Syndrome (MCAS)POTS, Dysautonomia, and Orthostatic Intolerance
Chronic UTI Symptoms but Negative Urine Cultures? My Story and What Finally Worked

Chronic UTI Symptoms but Negative Urine Cultures? My Story and What Finally Worked

Brandy Searcy
Published on: 23/07/2026

After 18 months of chronic UTI symptoms, recurrent infections, negative urine cultures, and relentless urinary urgency, I stopped chasing infection. This is my story, why the microinfection approach didn't work for me, and what finally brought relief

Interstitial Cystitis and chronic UTI
Is Your Morning Thyroid Hormone Tanking your DAO enzyme and making MCAS worse?

Is Your Morning Thyroid Hormone Tanking your DAO enzyme and making MCAS worse?

Brandy Searcy
Published on: 26/05/2026

On thyroid replacement hormone and still struggling with severe MCAS flares? Discover the link between thyroid hormone, cortisol, and mast cell activation and a few key considerations for supporting healthy histamine clearance.

Mast Cell Activation Syndrome (MCAS)