The Short Answer

Low stomach acid is a common problem in autoimmune and chronic illnesses that standard medications often worsen rather than fix. Testing your stomach acid levels and supporting natural acid production through diet and targeted supplements can restore digestive function and improve overall health outcomes.

Why Standard Stomach Acid Medications Often Backfire

Doctors typically treat acid reflux, gas, bloating, and heartburn with antacids, histamine type 2 receptor agonists (H2 blockers), Proton Pump Inhibitors (PPIs), or even surgery without testing actual stomach acid levels, even though that testing exists.

Unfortunately, these medications worsen the problem for many people.

Antacids temporarily lower stomach acid, triggering the stomach to produce more acid to restore its natural pH. This brings temporary relief but doesn’t address the underlying problem.

H2 blockers block a compound that activates stomach acid production. They work more slowly than antacids but last longer, and they also inhibit pepsin, a digestive enzyme that breaks down proteins.

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

All three approaches cause serious side effects and perpetuate chronic low stomach acid, along with the larger health conditions it causes.

How to Test for Low or High Stomach Acid

Most people don’t know about low stomach acid (hypochlorhydria) or that it plays a significant role in many chronic health conditions. Fortunately, several testing methods can help you understand your stomach acid status and guide your treatment approach.

Gastric acid secretion test. This invasive, expensive test is typically done for patients with stomach ulcers. It determines whether anti-ulcer medications are working and whether intestinal material is washing back into the stomach.

The Heidelberg Stomach Acid Test. Considered the gold standard for diagnosing hypochlorhydria, this test involves swallowing a small capsule with a radio transmitter that measures stomach pH as you drink a baking soda solution. If stomach acid doesn’t return to normal levels, this indicates hypochlorhydria. The test can identify hypochlorhydria (low acid), hyperchlorhydria (high acid), or achlorhydria (complete lack of acid).

CBC and CMP blood markers. These metabolic panel markers, combined with your symptoms, can suggest hypochlorhydria.

Betaine HCl challenge test. You can perform this at home using betaine HCl capsules from a health food store. Repeat it three times for accurate results. If you have low stomach acid, betaine HCl can boost your own acid production.

How to perform the test: 1. Buy Betaine HCl with pepsin 2. Eat at least 6 ounces of protein (vegetables are fine too) 3. Take one betaine HCl pill in the middle of the meal 4. Observe what happens when you finish

Possible outcomes:

• No symptoms likely indicate low stomach acid
• Indigestion, burning, heat, or heaviness in your chest suggests your stomach acid levels are appropriate

Repeat the betaine HCl challenge two to three times to confirm. Three positive tests provide the best confirmation of low stomach acid.

False positives can occur if you didn’t eat enough protein, took the capsule before the meal, or have a hiatal hernia; rule out structural issues with a medical exam if needed.

Baking soda stomach acid test. Though less accurate, this free at-home test provides insight into your stomach acid levels and can track changes over time.

First thing in the morning, before eating or drinking: 1. Mix ¼ teaspoon baking soda in 4 to 6 ounces of cold water 2. Drink the solution 3. Time yourself for five minutes and note when you burp

Not burping within five minutes or burping after 3 minutes may indicate low stomach acid. Early, repeated burping may signal high stomach acid (don’t confuse this with air-swallowing burps).

Associated Tests for Stomach Acid Problems

Because proper digestion is critical to gut and immune health, low stomach acid often connects to other measurable conditions:

B12 levels. Intrinsic factor in the stomach is necessary for B12 absorption and stops functioning when stomach acid is too low, resulting in vitamin B12 deficiency.

Homocysteine levels. Sufficient stomach acid is needed to absorb B12, which keeps inflammatory homocysteine at healthy levels. Low B12 allows homocysteine to rise, a problem for autoimmune patients.

Five Strategies to Support Healthy Stomach Acid

Eat protein at the beginning of your meal to stimulate digestive enzyme production.

Chew thoroughly to initiate the digestive process and signal your stomach to prepare acid.

Limit liquid intake during meals to allow stomach acid to concentrate and aid digestion. Excessive water dilutes digestive capacity.

Stay hydrated between meals to support gut motility and prevent intestinal contents from washing back into the stomach.

Take betaine HCl with pepsin supplements to support healthy stomach acid levels and overall gut function. Take HCl halfway through or at the end of your meal; taking it before can create false heartburn and suppress natural acid production. Caution: Do not take HCl if you’re using NSAIDs like ibuprofen, Tylenol, or aspirin.

When you feel warmth in your stomach, you’re taking enough. Back off slightly to avoid a burning sensation. You may need to lower your dose over time as your natural stomach acid production improves. Individual needs vary significantly.

Pepsin. Typically used with HCl, pepsin is a safe digestive aid.

Digestive enzymes help break down food proteins. Use a high-quality blend suited to your needs.

Apple cider vinegar. Take 1 tablespoon in a small amount of water before eating to stimulate acid production.

Taking time to improve your stomach acid levels will make a significant difference in your symptoms and quality of life. For autoimmune patients, especially, restoring digestive function often improves nutrient absorption, reduces inflammation, and eases flare-related digestive symptoms.

Contact RedRiver Health and Wellness to work with a functional medicine doctor who understands how digestive health supports autoimmune recovery.