Heartburn, acid reflux, and GERD (gastroesophageal reflux disease) plague millions — around 20% of adults in places like the US and increasingly worldwide. The standard medical line is straightforward: too much stomach acid splashes up, burning the oesophagus. So, doctors prescribe proton pump inhibitors (PPIs) like Prilosec (omeprazole), Nexium, or former favourites like Zantac to slash acid production. Billions of doses later, many patients stay on them for years, often lifelong. But what if this approach is backwards for a large chunk of sufferers? What if the real issue is not enough stomach acid (hypochlorhydria), and suppressing what's left makes things worse?

This alternative view, spotlighted in a recent A Midwestern Doctor article and amplified by Senator Ron Johnson's personal story on Tucker Carlson's show, challenges the dominant narrative. Johnson, after years of ineffective PPI use, tried supplementing with betaine HCl (a form of hydrochloric acid) and saw his reflux vanish — better than any prescription, and he only needs it sporadically now. The mechanism? Stomach acid isn't the enemy; it's the signal that keeps the lower oesophageal sphincter (LES) — the valve between stomach and oesophagus — tightly closed. Low acid means a weak signal, a lax valve, and even trace acid leaking upward, causing that burning sensation.

This isn't fringe speculation. It's rooted in physiology, older clinical observations, and emerging (though limited) modern evidence. While mainstream medicine often dismisses it due to sparse large-scale trials, the logic holds up, and the downsides of long-term PPIs are increasingly hard to ignore.

The Physiology: Why Low Acid Can Cause Reflux

The LES is pH-sensitive: it clamps shut when it detects sufficient acidity in the stomach, preventing backflow during digestion. If acid levels are too low, the valve doesn't get the memo to close properly. Food and liquids sit longer, ferment, produce gas, and push small amounts of remaining acid (or bile) into the oesophagus. That irritation feels like "too much acid," but the root is inadequate acidity failing to trigger closure.

Aging plays a big role — acid production drops with age, explaining why GERD risk rises over time. Other culprits include H. pylori infections (which can suppress acid), autoimmune gastritis, nutrient deficiencies (e.g., zinc, needed for acid production), medications, and even chronic stress or poor diet. Jonathan Wright, a pioneer in this area, tested thousands in his clinic and found over 90% of reflux patients had low acid, not high.

Historical echoes support this: In the 1930s–1940s, dilute HCl was used to treat asthma linked to low acid (one study cured most asthmatic kids within months). Wright's work in the 1990s–2000s built on this, linking low acid to poor digestion, nutrient malabsorption, and even autoimmune flares.

The PPI Trap: Dependency and Collateral Damage

PPIs are powerhouse drugs for short-term use (e.g., ulcers, severe erosive esophagitis). But for everyday heartburn? They're often overprescribed — 15%+ of adults use them, many chronically. The rebound effect is brutal: stopping causes acid hypersecretion, worsening symptoms and hooking patients back on. Worse, long-term risks stack up:

Infections — Low acid removes a key barrier against pathogens. Studies link PPIs to 2–4x higher risk of C. difficile, pneumonia (especially in hospitals), food poisoning, and small intestinal bacterial overgrowth (SIBO).

Nutrient Deficiencies — Acid is crucial for absorbing B12, iron, calcium, magnesium, zinc. Long-term use ties to anaemia, osteoporosis/fractures, hypomagnesemia, and fatigue.

Other Harms — Meta-analyses show elevated risks for chronic kidney disease, cardiac events, dementia, higher overall mortality, and even stomach cancer (1.8x in some reviews). One analysis pegged 19% higher mortality overall.

These aren't fringe claims — reviews in journals like Gastroenterology and PMC articles acknowledge associations, though causation debates persist and guidelines often say benefits outweigh risks for indicated cases. Still, the FDA has warnings for fractures, infections, and deficiencies.

Betaine HCl: A Simple, Cheap Counter-Approach

Betaine HCl supplements provide hydrochloric acid bound to betaine (from beets), taken with protein-heavy meals to mimic natural secretion. Small studies show it rapidly drops gastric pH (e.g., from 5.2 to 0.6 in PPI-induced low-acid volunteers, lasting ~73 minutes below pH 3). Case reports and functional medicine protocols (e.g., the "HCl challenge" — starting low and titrating until warmth/burning signals enough acid) report symptom relief in hypochlorhydria-linked issues.

Johnson's anecdote fits: after ditching PPIs and adding betaine HCl, reflux gone. Similar stories abound in functional health circles, especially for those with Hashimoto's, IBS, or post-PPI rebound.

But evidence is mostly observational, small-scale, or mechanistic — not large RCTs proving it cures GERD broadly. Some reviews call it promising but understudied; it's not a panacea. Risks include irritation if you have ulcers, active H. pylori (could worsen), or hiatal hernia — always test under guidance.

Broader Implications: Digestion as Gateway Health

Low stomach acid doesn't just cause reflux — it impairs protein breakdown (leading to amino acid shortages, even mood issues), invites bacterial overgrowth, and starves you of nutrients. Links appear to asthma, allergies, skin problems, autoimmune diseases, fatigue, and accelerated aging. Restoring acid could ripple positively across systems.

Critics argue the "low acid causes reflux" view oversimplifies — hiatal hernias, obesity, diet, and motility matter too. PPIs help many short-term, and not everyone on them suffers horrors. But for chronic users with persistent symptoms, exploring hypochlorhydria (via symptoms, baking soda test, or Heidelberg capsule if available) makes sense before more drugs.

In Australia's autumn chill, if heartburn flares after meals or you're on long-term PPIs, this perspective might prompt a rethink. Start simple: apple cider vinegar (diluted), bitter foods to stimulate acid, or consult a GP/functional doc about betaine HCl. Johnson's story reminds us: sometimes the "cure" is restoring what the body already knows to do.

As always, no medical advice is offered; for information purposes only!

https://www.midwesterndoctor.com/p/stomach-acid-is-vital-for-health