Histamine isn’t just about allergies.
In this episode of Off the Charts, Dr. Bobby Parmar sits down with Dr. Krista Moyer, ND to unpack one of the most misunderstood mechanisms in medicine right now: histamine.
From brain fog and anxiety…
To IBS, GERD and diarrhea…
To heavy bleeding, PMS and perimenopause shifts…
Histamine can act as a systems-level amplifier — especially in people with Mast Cell Activation Syndrome (MCAS) or histamine intolerance.
Dr. Moyer shares her origin story into histamine medicine and explains:
What mast cell activation syndrome (MCAS) actually isHow MCAS differs from histamine intoleranceThe role of DAO and HNMT enzymesWhen genetics matter — and when they don’tWhy perimenopause can amplify histamine symptomsThe estrogen ↔ histamine feedback loopHow antihistamines (H1, H2) and quercetin are used clinicallyWhy the low histamine diet is temporary — not a life sentenceThe link between histamine and menstrual painBrain fog and anxiety as histamine-driven symptomsWhy allergist testing doesn’t always rule this outThey also break down when to experiment with antihistamines, when diet matters most, and why a bucket-load theory of “histamine burden” often makes more sense than chasing a single trigger.
This episode is for anyone who has been told their labs are normal — but still doesn’t feel normal.
The difference between MCAS and histamine intoleranceHow histamine affects the gut, brain, skin, and hormonesWhy perimenopause can amplify histamine symptomsThe bucket theory of “histamine load”When the low histamine diet is useful (and how long to try it)How antihistamines and quercetin are used clinicallyWhy allergy testing doesn’t rule histamine issues out 00:00 – Why the low histamine diet feels impossible 02:30 – Dr. Moyer’s origin story 03:55 – What is MCAS? 06:25 – The histamine “bucket” theory 09:27 – Perimenopause & estrogen connection 13:27 – What the low histamine diet involves 19:42 – Antihistamines: H1, H2 & quercetin 22:35 – MCAS explained simply 26:55 – MCAS vs histamine intolerance 29:55 – Digestive symptoms & IBS 31:07 – Pain, PMS & inflammation 32:02 – Brain fog & anxiety 38:04 – Is histamine a villain? 39:18 – Cetirizine & the blood-brain barrier 41:37 – Benadryl for period pain? ⚠️ This video is for educational and informational purposes only and is not medical advice. Always consult a qualified healthcare provider before starting or stopping medication.
American Academy of Allergy, Asthma & Immunology (AAAAI) — Mast Cell Activation Syndrome (MCAS)
https://www.aaaai.org/conditions-and-treatments/library/allergy-library/mast-cell-activation-syndromeNational Institutes of Health (NIH) — Mast Cell Activation Syndrome Overview
https://www.ncbi.nlm.nih.gov/books/NBK539870/Johns Hopkins Medicine — Mast Cell Disorders https://www.hopkinsmedicine.org/health/conditions-and-diseases/mast-cell-disorders
Cleveland Clinic — Histamine Intolerance https://my.clevelandclinic.org/health/diseases/24854-histamine-intoleranceMayo Clinic — Hives (Urticaria) and Mast Cell Overview https://www.mayoclinic.org/diseases-conditions/chronic-hives/symptoms-causes/syc-20352719Journal of Allergy and Clinical Immunology (JACI) — Mast Cell Activation Disorders https://www.jacionline.org/National Institutes of Health (NIH) — Histamine Metabolism Overview https://pubmed.ncbi.nlm.nih.gov/17272405/ CONNECT WITH GRAVITY HEALTH
Website → https://www.gravityhealthclinics.com/ Book a Consult → https://gravityhealth.janeapp.com/ Mint Reproductive Health → https://mintreproductivehealth.com/ Dr. Krista Moyer → http://www.drkristamoyer.com/ Gravity Health Clinics → https://www.instagram.com/gravityhealthclinics/ Dr. Bobby Parmar → https://www.instagram.com/docparmar_nd/ Dr. Paul Maximus → https://www.instagram.com/drmaximus/ Mint Reproductive Health → https://www.instagram.com/mintreproductivehealth/ Dr. Krista Moyer → https://www.instagram.com/drkristamoyer/ Off the Charts is a podcast by Gravity Health, created for general informational and educational purposes only. It does not constitute the practice of medicine, nursing, or any other healthcare service, and should not be taken as medical advice. Listening to this podcast does not create a doctor–patient relationship.
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