EPISODE # 38

Helicobacter pylori, Low Stomach Acid & Histamine: The Gut Cascade Explained

The Link Between H. pylori, SIBO & Histamine Symptoms

In this episode of The Histamine Well Podcast, Joanne explores how Helicobacter pylori can drive histamine intolerance, SIBO, and hormone imbalances — even when classic ulcer or reflux symptoms are absent.

Joanne explains how H. pylori survives stomach acid through urease activity, producing ammonia that lowers hydrochloric acid levels. This disruption to stomach acidity can impair protein digestion, reduce mineral absorption, weaken pathogen control, and interfere with pancreatic enzymes and bile flow. The downstream result may include fermentation, mast cell activation, and rising histamine levels throughout the body.

She unpacks how low stomach acid and H. pylori can contribute to small intestinal bacterial overgrowth (SIBO), creating what she describes as a “histamine storm” — a cycle of inflammation, gas, gut permeability, and systemic symptoms such as hives, eczema, headaches, anxiety, insomnia, food reactions, and worsening PMS or perimenopause.

Joanne also discusses the treatment dilemma surrounding triple therapy (antibiotics plus proton pump inhibitors), how PPIs may further lower stomach acid, and when natural strategies such as sulforaphane and gut-healing supports may be appropriate.

If you are struggling with persistent histamine symptoms, hormone chaos, or SIBO that doesn’t fully resolve, this episode explores a deeper root cause that is often overlooked.

What You’ll Learn in This Episode:

  • What Helicobacter pylori is and how it survives stomach acid
  • How urease activity converts urea into ammonia and disrupts hydrochloric acid levels
  • The connection between low stomach acid and histamine intolerance
  • How mast cell activation contributes to systemic histamine symptoms
  • Why poor protein digestion can increase fermentation and histamine load
  • The link between H. pylori, low stomach acid, and SIBO
  • How SIBO amplifies inflammation and histamine production
  • The gut–brain connection behind anxiety, insomnia, headaches, and vertigo
  • How histamine can worsen PMS, estrogen dominance, and perimenopause symptoms
  • The pros and cons of triple therapy and proton pump inhibitors
  • Natural support options including sulforaphane and gut-healing nutrients

Stay well,

Joanne Kennedy

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