The PPI Problem

Proton pump inhibitors (PPIs) — omeprazole, esomeprazole, lansoprazole, pantoprazole — are among the most prescribed medications worldwide. They suppress stomach acid production by up to 99% and provide effective symptom relief for acid reflux and GERD (Gastroesophageal Reflux Disease).

But there is a growing problem: PPIs were designed for short-term use (4-8 weeks), yet millions of people take them for years or decades. Long-term PPI use is associated with increased risk of nutrient deficiencies (magnesium, B12, iron, calcium), kidney disease, C. difficile infection, SIBO, and potentially bone fractures. More fundamentally, PPIs suppress the symptom (acid sensation) without addressing why the reflux is occurring.

Understanding the root causes of acid reflux opens the door to interventions that address the problem at its source.

Root Cause 1: Low Stomach Acid (Hypochlorhydria)

This is perhaps the most counterintuitive root cause: many people with acid reflux actually have too little stomach acid, not too much. This seems paradoxical, but the mechanism is well understood.

When stomach acid is insufficient:

  • Food sits in the stomach longer because acid is needed to trigger pyloric sphincter opening and gastric emptying
  • Delayed gastric emptying increases intra-gastric pressure
  • Increased pressure pushes stomach contents upward through the lower oesophageal sphincter (LES)
  • Even small amounts of acid in the oesophagus cause burning, because the oesophageal lining has no protective mucus layer
The distinction matters because the treatment is opposite: if reflux is caused by low acid, taking a PPI (which further reduces acid) provides temporary symptom relief but worsens the underlying problem. Gastric emptying slows further, and bacterial overgrowth may develop.

Causes of low stomach acid include ageing (acid production naturally decreases with age), chronic H. pylori infection, chronic stress (sympathetic dominance suppresses digestive secretions), and — ironically — long-term PPI use itself.

Root Cause 2: SIBO and Small Intestinal Bacterial Overgrowth

Bacterial overgrowth in the small intestine produces gas through fermentation. This gas increases intra-abdominal pressure, which pushes upward on the stomach, forcing contents through the LES. Several studies have demonstrated that SIBO treatment resolves or significantly improves reflux symptoms in patients who had been dependent on PPIs.

The connection is bidirectional: PPIs used to treat reflux reduce stomach acid, which is a key defence against SIBO, potentially causing the very condition that drives the reflux.

Root Cause 3: Lower Oesophageal Sphincter Dysfunction

The LES is a muscular valve between the oesophagus and stomach. When it functions properly, it prevents stomach contents from flowing upward. Several factors weaken LES tone:

  • Hiatal hernia — a condition where part of the stomach pushes through the diaphragm, disrupting LES function. Present in up to 60% of people over 60
  • Obesity — increased abdominal pressure from visceral fat directly pushes on the stomach and weakens the LES
  • Certain medications — calcium channel blockers, benzodiazepines, and anticholinergics relax the LES
  • Smoking and alcohol — both directly reduce LES pressure
  • Eating patterns — large meals, eating close to bedtime, and lying down after eating all increase reflux episodes

Root Cause 4: Impaired Gastric Motility

The stomach should empty its contents into the small intestine within 2-4 hours of a meal. When gastric motility is impaired (gastroparesis or functional dyspepsia), food remains in the stomach longer, increasing the opportunity for reflux. Common causes include vagal nerve dysfunction, diabetes, hypothyroidism, and certain medications.

Root Cause 5: Food Sensitivities and Inflammatory Foods

Certain foods directly reduce LES pressure or increase acid production:

  • Caffeine and chocolate (both reduce LES pressure)
  • Spicy foods (may irritate an already-inflamed oesophagus)
  • Citrus and tomatoes (acidic foods that irritate damaged tissue but do not cause reflux per se)
  • Mint (relaxes the LES)
  • High-fat meals (delay gastric emptying)

However, individual triggers vary considerably. Rather than following a generic "reflux diet," tracking your personal triggers with a food and symptom diary is far more effective.

Evidence-Based Alternatives to Long-Term PPIs

Lifestyle Modifications

  • Elevate the head of the bed 6-8 inches (gravity reduces nocturnal reflux)
  • Finish eating at least 3 hours before bedtime
  • Eat smaller, more frequent meals
  • Lose weight if BMI is above 25 (even modest weight loss reduces reflux frequency)
  • Avoid lying down after meals

Digestive Support

  • Betaine HCl with pepsin — for individuals with confirmed or suspected low stomach acid (start low and titrate under practitioner guidance; contraindicated if ulcers or gastritis are present)
  • Digestive bitters — stimulate digestive secretions and improve gastric emptying
  • Ginger — a prokinetic that accelerates gastric emptying; 1-2g daily before meals

Mucosal Support

  • DGL (deglycyrrhizinated liquorice) — promotes mucus production and supports oesophageal tissue repair; 400mg chewed before meals
  • Zinc carnosine — supports gastric mucosal healing; 75mg twice daily
  • Slippery elm and marshmallow root — demulcent herbs that coat and soothe irritated oesophageal and gastric tissue

Addressing Underlying SIBO

If SIBO is contributing to reflux, treating the overgrowth (with Rifaximin or herbal antimicrobials) and supporting the migrating motor complex can resolve reflux symptoms without needing ongoing acid suppression.

GutIQ's assessment evaluates multiple factors that contribute to reflux, including upper GI symptoms, meal-timing patterns, and related conditions like SIBO and motility dysfunction. Understanding the root cause of your reflux is the first step toward a solution that does not require lifelong medication.