Low Stomach Acid and Indigestion with Dr Mohammed AlZaqam

Low Stomach Acid and Indigestion: Are Antacids Preventing You from Burning Fat and Building Muscle?
Do you experience bloating after consuming protein and find yourself constantly taking antacids? Surprisingly, the root cause might be a *deficiency* in stomach acid, not an excess! How does poor nutrient absorption lead to muscle breakdown and hinder fat burning?
In a nutshell:
More than 70% of "acidity" and acid reflux cases are actually caused by low stomach acid (hypochlorhydria) and a weakened lower esophageal sphincter (the valve between the esophagus and the stomach).

Antacids and proton pump inhibitors (PPIs) increase the pH level of the stomach (making it more alkaline), which impairs protein digestion and the absorption of iron, vitamin B12, and zinc.
Failure to break down protein into amino acids prevents muscle growth and lowers your daily metabolic rate.
Undigested food ferments in the stomach, causing gas, bloating, and potentially leading to Small Intestinal Bacterial Overgrowth (SIBO).
A simple at-home sodium bicarbonate test can reveal how efficiently your stomach produces hydrochloric acid in just 5 minutes.
Organic, unpasteurized apple cider vinegar—along with stimulating the vagus nerve through slow, deliberate chewing—can help naturally restore the stomach’s acidic environment.

How many times have you felt a burning sensation in your upper stomach or uncomfortable bloating after a meat-heavy meal, prompting you to rush to the pharmacy for an antacid or a gastric acid suppressant (such as Omeprazole or Pantoprazole)—only to end up taking it daily for months or even years? A surprising medical reality we encounter daily in our clinical nutrition practice is that the vast majority of patients do not suffer from "excess stomach acid." In fact, they suffer from the exact opposite: a severe deficiency or weakness in their natural hydrochloric acid (hypochlorhydria).

Even more concerning is that the unnecessary use of acid-reducing medications is a hidden culprit behind failed weight-loss efforts, muscle wasting, hair loss, and stubborn weight plateaus.

The medical paradox: How can "low acid" cause sensations of acidity and reflux?
The stomach is biologically designed to be a highly acidic environment (with a pH level between 1.5 and 2.5)—a level of acidity sufficient to dissolve minerals and sanitize food by eliminating microbes. The valve separating the esophagus from the stomach (the lower esophageal sphincter) operates via precise chemical sensors:

When stomach acid is sufficiently strong and acidic, the valve detects this acidity and closes tightly, preventing even a single drop from escaping into the esophagus.
Conversely, when stomach acid is weak—tending toward an alkaline state—the valve fails to receive the chemical signal to close; it remains relaxed and open.
Consequently, even this weak acid can reflux upward into the delicate, unprotected tissues of the esophagus, causing a burning sensation. You might mistakenly assume you have "too much" acid and take medication that weakens it even further! The Direct Link Between Low Stomach Acid, Fat Burning, and Muscle Mass
1. Muscle Mass Breakdown (Inability to Absorb Protein)
The protein you consume—whether from meat, eggs, fish, or cottage cheese—cannot be absorbed by your body in its complex, large-molecule form. For protein to be broken down, hydrochloric acid is required to activate the enzyme pepsin, which acts as a "molecular scissor" that cleaves protein chains into individual amino acids. When stomach acid is insufficient, protein enters the intestines undigested. The consequences are:
Your muscles fail to receive leucine—an essential amino acid required for muscle building and recovery—leading to muscle atrophy (wasting).
Muscle atrophy directly causes a drop in your Basal Metabolic Rate (BMR) and can result in sagging skin following weight loss.

2. Iron and Vitamin B12 Deficiency, and Mitochondrial Impairment
Mitochondria—the "fat-burning furnaces" within your cells—require iron and vitamin B12 to carry out the oxidation of fatty acids. The absorption of plant-based iron and protein-bound vitamin B12 strictly necessitates a highly acidic environment, as well as an "intrinsic factor" secreted by the stomach lining. Low stomach acid leads to latent anemia and a decline in the energy-producing capacity of fat-burning cells.

3. Small Intestinal Bacterial Overgrowth (SIBO) and Insulin Resistance
Stomach acid serves as the primary line of defense, sterilizing food and eliminating harmful bacteria and fungi. When it weakens, bacteria can pass into the small intestine while still alive and multiply there. This causes severe gas and bloating within minutes of eating. Furthermore, these bacteria release endotoxins (LPS) that penetrate the intestinal wall, triggering systemic inflammation—which exacerbates insulin resistance and hinders the burning of abdominal fat.

How can you test the strength of your stomach acid at home? (The Sodium Bicarbonate Test)
A simple at-home test that provides an initial indication of your stomach acid strength:

First thing in the morning, before consuming any food or drink, dissolve a quarter-teaspoon of sodium bicarbonate (baking soda) in half a cup of water.
Drink the solution and start a timer.
Normal result: You should belch within 2 to 3 minutes (as the alkaline bicarbonate reacts with the stomach acid to rapidly produce carbon dioxide gas).
Indication of weak acid: If 5 minutes pass without any belching, it is a strong sign that your stomach acid is very weak or insufficient.

Recovery plan to restore digestive strength and fat-burning capacity (as recommended in our clinic):
Organic, natural apple cider vinegar (with "the mother"): Drinking one teaspoon of raw apple cider vinegar—diluted in a cup of warm water—ten minutes before protein-rich meals helps restore an acidic environment and stimulates the secretion of digestive enzymes.
Avoid drinking large amounts of water during meals: Consuming large quantities of water while eating dilutes the concentration of stomach acid and digestive enzymes. Drink either half an hour before a meal or an hour after it.
Stimulating the vagus nerve through slow chewing: The stomach has no teeth; thorough chewing sends signals via the vagus nerve, prompting the stomach lining to secrete ample acid in preparation for the arrival of food.
This article is for general educational purposes—provided by Dr. Mohamed Al-Zaqam’s clinic—and is not a substitute for a professional medical evaluation during an in-person consultation.