The Short Answer

Low stomach acid, not high acid, is the culprit behind many digestive complaints like bloating, heartburn, and acid reflux. Common medications like antacids and proton pump inhibitors can worsen the problem by suppressing acid production long-term. Testing your stomach acid and supporting it naturally through diet and targeted supplements often resolves digestive issues at their root.

Why antacids often make digestion worse

Symptoms like bloating, heartburn, acid reflux, and indigestion often get diagnosed as high stomach acid and treated with prescription antacids, histamine type 2 receptor agonists (H2 blockers), Proton Pump Inhibitors (PPIs), or even surgery. However, for many people, these treatments fail to address the root cause and may cause more harm than good.

Antacids reduce stomach acid in the short term, but the stomach compensates by producing more acid to maintain necessary pH levels.

H2 blockers inhibit acid production and work more slowly than antacids, but last longer. However, they also stop pepsin production—a critical enzyme needed to break down protein.

Proton pump inhibitors block the enzyme that signals your stomach to produce acid.

All three methods can cause serious side effects and lead to chronic low stomach acid, nutrient deficiencies, and other health conditions that compound over time.

5 methods to test stomach acid levels

Most people don’t recognize low stomach acid, or hypochlorhydria, and never connect it to their chronic digestive or autoimmune complaints. Fortunately, several testing options can identify the problem so you can address it at its foundation.

1. Gastric acid secretion test. This highly invasive and expensive test is used when stomach ulcers are suspected. It can track whether anti-ulcer drugs are working and detect if intestinal contents are backwashing into the stomach.

2. The Heidelberg Stomach Acid Test. This is the gold standard for diagnosing hypochlorhydria. You swallow a radio transmitter that measures stomach acidity while you drink a baking soda solution to neutralize stomach acid. Failure to return to normal pH indicates hypochlorhydria. At roughly $350, this test is rarely covered by insurance.

3. CBC and CMP blood panels. These standard markers can point toward hypochlorhydria when results are interpreted in context.

4. Betaine hydrochloride (HCl) challenge. This affordable at-home test costs about $20:

1. Buy Betaine HCl with pepsin 2. Eat at least 6 ounces of protein 3. Mid-meal, take one betaine HCl capsule 4. Finish eating and observe your response

Possible outcomes:

• No symptoms suggest low stomach acid
• Indigestion, burning, heat, or chest heaviness indicate adequate stomach acid levels

Repeat the test three times. Three positive responses suggest low stomach acid.

False positives can occur if you consume too little protein, take the capsule before a meal, or have esophageal sphincter dysfunction, such as a hiatal hernia.

5. Baking soda stomach acid test. First thing in the morning, before eating or drinking:

1. Mix ¼ teaspoon baking soda in 4–6 ounces of cold water 2. Drink the solution 3. Time how long until you burp (within 5 minutes)

Not burping within five minutes may indicate low stomach acid. Burping after 3 minutes specifically suggests hypochlorhydria. Early repeated burping may indicate excess acid (distinguish this from air swallowed while drinking).

Important associated tests for autoimmune patients

If you suspect low stomach acid, ask your functional medicine doctor about testing:

B12 levels: Intrinsic factor in the stomach is necessary for vitamin B12 absorption. When stomach acid is low, intrinsic factor cannot function properly, causing B12 deficiency, a serious concern for autoimmune patients.

Homocysteine levels: Stomach acid enables B12 absorption, which is necessary for methylation that regulates inflammatory homocysteine. Low B12 allows homocysteine to rise, increasing cardiovascular and autoimmune inflammation.

Natural strategies to support healthy stomach acid

Eat protein first. Start meals with protein to trigger proper acid secretion needed for digestion.

Chew thoroughly. Protein must be mechanically broken down to be digested properly and signal continued acid production.

Limit liquids during meals. Avoid drinking large amounts until at least 30 minutes after eating to allow proper stomach acid production, pathogen sterilization, and protein metabolism.

Hydrate between meals. Drinking water between meals supports gut motility and helps move intestinal contents forward, rather than allowing backflow into the stomach.

Betaine hydrochloride supplements. These safely restore normal stomach acid levels. Take HCl mid-meal or at the meal’s end, never before, as this can create false heartburn sensations and suppress acid production for that meal. Do not use if taking NSAIDs like ibuprofen, acetaminophen, or aspirin.

HCl with pepsin. Add these when consuming protein. You’ll feel warmth in your stomach when taking enough; then reduce by one capsule and monitor response. Needs vary by individual.

Pepsin. Used alongside HCl, pepsin is very safe when taken to assist protein digestion.

Digestive enzymes. High-quality enzyme blends help break down food proteins effectively.

Apple cider vinegar. One tablespoon in water right before meals can support digestion.

Fermented foods. Sauerkraut, kimchi, pickles, pickled ginger, and water kefir contain organic acids, enzymes, and probiotics that support digestion. They’re also antimicrobial and help fight H. pylori, which interferes with stomach acid production.

Taking time to restore healthy stomach acid levels often dramatically improves digestive symptoms and quality of life, particularly for autoimmune patients dealing with overlapping gut dysfunction.

FAQ

Contact RedRiver Health and Wellness to work with a functional medicine doctor who understands the digestive-autoimmune connection.