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 POTSMCAS dysautonomiahypothyroidism and POTSHashimoto's and POTSthyroid and POTSHashimoto's and dysautonomialow T3low thyroid POTSlow thyroid dysautonomiathyroid dysautonomiaPOTS dysautonomiaorthostatic intolerancelow T3 POTSlow T3 dysautonomia
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.

low T3low T3 normal TSHlow T3 symptomslow thyroid symptomshypothyroid symptoms normal TSHhypothyroidism normal TSHT3 reverse T3T4 to T3 conversionreverse T3low T3 high reverse T3thyroid hormone conversion
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

chronic UTI symptomsrecurrent UTIrecurrent urinary tract infectionsnegative urine cultureschronic UTI symptoms but negative urine cultureurinary urgencyconstant urge to urinateinterstitial cystitisIC bladder symptomsbladder pain syndromemicroinfection theorymicroinfection urinary urgencychronic urinary urgencyUTI symptoms with negative urine culturewhy do I have UTI symptoms but no infection
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.

why is my mcas getting worsethyroid replacement hormone and mcaswhat makes mcas worsehow to support histamine clearancedoes thyroid medication trigger histaminemcas and cortisol clearancelow dao enzyme causesthyroid hormone adrenaline spikemast cell activation syndrome triggershow to increase dao naturallymorning synthroid mcas flarehashimotos histamine intolerancecrh acth mast cell degranulationgut inflammation after breakfast