Stomach Acid: Too Much or Too Little?

Doctors generally prescribe proton pump inhibitors (or histamine-2 blockers, or recommend over-the-counter antacids) for patients they believe have Gastro Esophageal Reflux Disease (GERD), or, who have heart burn, pain, pressure or other symptoms that are commonly blamed on “too much stomach acid,” or “acid indigestion.” Presumably, these symptoms result from the stomach producing too much hydrochloric acid, the acid essential for the first stage of efficient digestion of proteins, carbohydrates, and fats. Proton pump inhibitors have 2 effects – they destroy the stomach’s ability to produce hydrochloric acid, and they stimulate the stomach to empty its contents into the duodenum.

We will explain below why blocking the natural production of hydrochloric acid is always a bad idea, and often causes disastrous consequences. We will also explain that it is the drug-stimulated emptying of the stomach, not the decrease of stomach acid production, that gives the symptomatic relief when these drugs do give symptomatic relief. You will learn why blocking the secretory function of the stomach and stimulating stomach emptying (often at an inappropriate time) usually assures that the symptoms for which the drug is taken will return. In other words, even when the drug temporarily relieves symptoms, it makes the cause of the symptoms worse.

Truly, it is not excess stomach acid, but a deficiency of stomach acid (hypochlorhydria) that causes most upper GI symptoms. Sufficient stomach production of hydrochloric acid is essential:

  • for efficient digestion of proteins, fats, and carbohydrates
  • for efficient absorption of minerals and trace minerals
  • for efficient absorption of vitamin B12 and vitamin C
  • to kill ingested bacteria, viruses, yeast, fungi, and parasites
  • to prevent food allergies
  • to prevent stomach ulcers
  • for efficient timing of stomach emptying

All these essential functions are crippled in patients given proton pump inhibitors by well-meaning but misinformed physicians.

The reason many patients feel they need proton pump inhibitors is due to their hypochlorhydria. Hypochlorhydria is extremely common. – We call it a 50/50 condition. By that we mean that 50% of the people over 50 years old are at least somewhat deficient in hydrochloric acid. The only reason we do not make a bigger point of this with NUTRI-SPEC doctors is because many of those people that are low in hydrochloric acid are also low in either pancreatic bicarbonate production or bile production.

So, while they are low in acid, they are also low in alkali. Supplementing these people with hydrochloric acid (Proton Plus) can be easily overdone because while the Proton Plus is absolutely essential to improve stomach function, they do not have the pancreatic or liver capability of neutralizing that acid once it reaches the duodenum. – But in those with at least close to normal pancreatic and biliary function, Proton Plus supplementation with meals is a tremendous benefit, not only in terms of digestive efficiency, but even more importantly in assisting the immune system in eliminating opportunistic and pathogenic bacteria as well as yeast/mold/fungi/and parasites.

Proton pump inhibitors inhibit the effective digestion of protein, and almost totally inhibit the absorption of minerals and trace minerals, particularly magnesium, calcium, potassium, copper, manganese, and iron. These drugs cause such extreme interference with mineral nutrient absorption they cause osteoporosis. The long-term effects of mineral depletion include increased hip fractures from osteoporosis in those who take these drugs over a long period.

There can actually be life-threatening low magnesium in those who take proton pump inhibitors daily for more than 3 months. Neurological symptoms, and neurovascular symptoms, and cardiac conditions are exacerbated by a magnesium deficiency. Even without these severe side effects, there are obvious disastrous nutritional and metabolic consequences of blocking the absorption of so many nutritionally essential minerals and trace minerals.

Another consideration as regards proton pump inhibitors is that many studies now show that they work little better than a placebo for upper GI and esophageal burning. Furthermore, one of the most common side effects of these drugs is stomach pain. Even more absurd than taking a drug that causes stomach pain for stomach pain, and is no more effective than a placebo, and causes mineral depletion and protein malabsorption, and will cause osteoporosis – is that the condition for which these drugs are prescribed, (GERD), is not even the correct diagnosis in many patients.

The medical literature is quite clear now that many cases diagnosed as GERD are not GERD, but Eosinophilic Esophagitis – one more pathology (like asthma and Eosinophilic Fungal Rhinosinusitis) associated with eosinophilic infiltration – but in this instance, infiltration of the esophagus with resultant inflammation. No cause has been agreed upon for Eosinophilic Esophagitis. It is just loosely attributed to “allergies” with the standard treatment being food allergy testing and food elimination, along with a prescription for the immunosuppressant steroid drug, prednisone.

Gastroenterologists are in somewhat of a tizzy over Eosinophilic Esophagitis, since it turns out that so many who have been diagnosed with GERD in the last 25 years actually have eosinophilic esophagitis, and not reflux at all. But since openly recognizing that fact would eliminate the zillion dollar pharmaceutical bonanza from selling proton pump inhibitors and related garbage, discussion of Eosinophilic Esophagitis has been suppressed.

Since eosinophilic infiltration is most common in patients who are Parasympathetic and/or Anaerobic, we would say it is almost a certainty that patients with those Metabolic Imbalances who also have upper GI burning, pressure, and pain, do indeed have Eosinophilic Esophagitis. There are many potential triggers to eosinophilic infiltration, but perhaps the most common is a reactivity to mold toxins – mold spores and mold fragments in the living and working environment. But whatever the trigger, correction of the Anaerobic and Parasympathetic Metabolic Imbalances is essential.

Here are some essentials of gastric physiology:

Vagus nerve activity (Parasympathetic) excites stomach secretion of acid, and of pepsin, and of mucin, both directly by stimulation of the gastric glands, and indirectly through the gastrin hormone mechanism.

Control of the stomach emptying rate is largely under the influence of the hormone gastrin. Adequate secretion of gastrin from the stomach mucosa depends largely on the secretion of highly acidic (high hydrochloric acid content) gastric juice by the stomach. This very important highly acid stomach secretion is most effectively stimulated by the presence of meat in the stomach.

The secretion of large amounts of hydrochloric acid by the stomach is essential for many reasons. The hydrochloric acid helps breakdown proteins in the food, both directly, and by stimulating the stomach secretion of the enzyme pepsin that aids in protein digestion. The high hydrochloric acid environment is essential for the absorption of the minerals and trace minerals – calcium, magnesium, potassium, manganese, copper, and iron.

The hydrochloric acid also regulates the rate of stomach emptying.

The hydrochloric acid also kills nasty critters that have entered the stomach – including bacteria, viruses, parasites, yeast, mold, and fungi.

Another essential function of the hormone gastrin associated with adequate hydrochloric acid production in the stomach is its constrictor effect on the gastroesophageal sphincter. It thus prevents reflux of gastric contents into the esophagus.

In summary: high hydrochloric acid production is essential for protein digestion, for mineral absorption, to kill pathological microbes in the GI tract, to ensure proper stomach emptying, and to prevent gastroesophageal reflux.

While timely stomach emptying depends largely on adequate production of hydrochloric acid in the stomach, there are also reflexes from the duodenum that inhibit stomach emptying – thus assuring that the stomach does not empty before the first stage of digestion in the stomach is complete, and, assuring that the contents of the stomach are not emptied into the duodenum faster than the duodenum can accommodate the efficient digestion of proteins, fats, and minerals through the rest of the intestinal tract. Adequate acid from the stomach therefore not only stimulates the emptying of the stomach, but also inhibits the emptying of the stomach, as the duodenum senses the acidity of the chyme entering it from the stomach.

Normal, healthy gastric secretion is extremely acidic – with a pH of less than 1 (0.8). That yields a normal overall pH of the stomach contents of between 1 and 2. Food entering the stomach generally has a pH near neutral (7.0). As the gastric secretions are stimulated and go to work on the food, the pH of the chyme gradually decreases to between 4 and 5, which is the ideal pH for the chyme to be slowly released into the duodenum. When the pH of the chyme entering the duodenum falls below 3.5-4.0, reflexes are activated to slow the stomach emptying until the duodenum can catch up.

So, excess acidity of the stomach (as in a Parasympathetic Imbalance, or patients who are taking certain drugs), will delay stomach emptying time. But stomach emptying time will also be delayed if the stomach produces inadequate hydrochloric acid such that the pH never gets down to 5. In either case – hypochlorhydria or hyperchlorhydria, upper GI symptoms will occur – and – the symptoms of hyperchlorhydria and hypochlorhydria are virtually identical.

When chyme passes from the stomach to the duodenum with the ideal pH of 4-5, the pancreatic secretions and the bile from the liver/gall bladder that mix with the chyme in the duodenum increase the pH up to 6.0 to 7.0. This is the optimum pH in the small intestine for the digestion of proteins to amino acids, starches to sugars, and for the absorption of minerals and trace minerals.

Clearly, there is no such thing as damage from “excess stomach acid.” The stomach is well-equipped to handle a pH of 1 or less with no problem at all. The only people who can be damaged by too much acid are those who are taking aspirin or certain other non-steroidal anti-inflammatory drugs, or those on prednisone.

The Heidelberg test for stomach acid has revealed how common is insufficient hydrochloric acid. The test involves administering a challenge with baking soda, then monitoring the change in stomach pH over time.

In a patient with normal fasting stomach pH of 1.5, an alkaline challenge with sodium bicarbonate will immediately raise the stomach pH to 7.2, but keep it there for only about 18 minutes. By 20-22 minutes, there is total re-acidification of the stomach in those who produce normal hydrochloric acid.

In some patients, a bicarbonate challenge will not yield a pH of 7.2, but a pH rise to only between 3.5 and 5. Such a failure to alkalize does not mean the patient has too much stomach acid, but rather that the fasting fluid volume in the stomach is higher for these people. So, with larger fasting juice volume, the normal quantity of bicarbonate used for the challenge is not enough to raise the pH all the way up to 7.2.

In patients with either achlorhydria or an extreme hypochlorhydria, the fasting stomach pH is not the normal 1.5, but is extremely high at a neutral reading of 7.0. In such patients the bicarbonate challenge actually raises the stomach pH slightly even higher for a few minutes, until the bicarbonate is passed from the stomach into the duodenum. In patients with such extreme deficiency of acid, food is actually dumped from the stomach into the duodenum very prematurely after a meal, particularly a large meal. The size of the meal stimulates the stomach to contract, but there is not enough acid in the chyme to activate the duodenal reflexes to inhibit stomach emptying, so the stomach just dumps very quickly, thus yielding completely ineffective first stage of digestion affecting both protein and mineral nutrition. Such patients often report passing completely undigested food in the stool.

These achlorhydric or extremely hypochlorhydric patients tend to suffer allergies, because of the insufficient digestion of protein. The partly digested protein particles are absorbed in the intestinal tract and pass into the bloodstream, thus eliciting the typical IgE/eosinophilic allergic reaction. Another possibility is a stimulation of an IgG immune reaction with delayed food reactivities.

In patients who are functionally but not extremely hypochlorhydric, the bicarbonate challenge of the fasting stomach will raise the pH from its typical state (somewhere between 1.5 and 3) up to a level of 7.0 to 8.0 – but – the pH will not fall back to normal in 22 minutes as it should, but may take several hours or longer.

In patients with a Parasympathetic Imbalance (particularly if accompanied by an excess of the stress hormone cortisol) there can actually be hyperchlorhydria. The excess stomach acid does not cause stomach ulcers. Patients with hyperchlorhydria will have a normal fasting stomach pH of between 1 and 2, and the bicarbonate challenge will raise the pH up to around 7, but the pH will drop back down to normal within 12-13 minutes.

The problem with too much stomach acid is not stomach ulcers, but the excess retention of food in the stomach for too long. Since the chyme released into the duodenum is excessively acid, the reflexes from the duodenum slow stomach emptying. So, the excessively acid chyme sits in the stomach for a long time. Instead of the stomach content pH being the optimal 4.0 to 4.5, it will range from 1.5 to 2.8. This acid chyme can be retained in the stomach for 6 hours, or even as long as 24 hours.

These people experience extreme discomfort when it is time for their next meal since they are stuffing that meal on top of the previous meal that is still trapped in the stomach. These people can be ravenously hungry even though their stomach is still full. The solution to hyperchlorhydria is to correct the Parasympathetic Metabolic Imbalance. Also, Phos Drops taken before the meal can be helpful. The acidity of the Phos Drops inhibits the stomach’s secretion of hydrochloric acid just enough that the pH of the chyme will reach the ideal 4.0 to 5.5 level so the stomach can gradually empty.

Heidelberg equipment is, as I understand it, reasonably accurate. However, I suspect it is rarely, if ever, necessary.

Your biggest concern is achlorhydria. But anyone with achlorhydria will have pernicious anemia, which will be evident on a CBC as an elevated mean corpuscular volume, and a follow-up vitamin B12 test will be low or low normal.

The MetaMetrix GI function profile can yield a pretty good idea of digestive function. If the triglycerides and so forth are elevated, then there is insufficient pancreatic function. If they are normal, then the presence of either putrefactive bacteria or an alkaline stool indicates a deficiency of hydrochloric acid.

An even simpler test is the good old baking soda challenge. Quite simply, baking soda in water is taken on an empty stomach (after at least a 10-hour over-night fast), and the subject awaits an uncontrollable BURP. This test is probably as reliable as the Heidelberg test. When sodium bicarbonate reacts with hydrochloric acid in the stomach it produces water, sodium chloride, and carbon dioxide. – The carbon dioxide is belched up. The simple chemical equation is:

NaHCO3 + HCl => NaCl + H2O + CO2

Why does this simple test work? Most people (including most doctors) do not realize that the stomach, even when empty, is extremely acid. In fact, the normal stomach has a pH below 2, and ideally very close to 1 at all times when it is empty. So, adding baking soda to an empty stomach should yield a burp within a few minutes.

There are actually 2 variables in a stomach that contains no food. One is the hydrochloric acid content of the stomach fluid, and the second is the quantity of stomach fluid. Any healthy person has an empty stomach pH of between 1 and 2, but some have a very dry stomach, and some have more secretion at rest. Basically, those who have higher secretion are your Parasympathetic types.

For the test, a person must be fasting for at least 10 hours. The patient drinks ¼ tsp. of baking soda in 8 oz. of cold water, then times how long until the big burp, or a series of small burps. People with normal acidity and normal quantity of stomach contents will belch within 2 or 3 minutes. Parasympathetic types with normal acidity but high fluid content will burp sooner. Those with low stomach acid will not burp for 4 or 5 minutes, and those with rather marked hypochlorhydria will never burp.

Additional notes:

  • Those with low hydrochloric acid are those who are subject to H. pylori infections (and stomach ulcers), as well as yeast overgrowth of the GI tract. (Note that H. pylori is the cause of stomach ulcers, and H. pylori infection is both caused by and causes hypochlorhydria. Treating gastric/peptic ulcers with antacids is absolute insanity.)
  • Esophageal reflux or GERD is never caused by excess stomach acid, but frequently involves low stomach acid. We would guess that about half the cases of GERD are insufficient stomach acid (which slows stomach emptying time and allows the stomach contents to be forced up into the esophagus), or, has nothing to do with the stomach function at all, but rather is misdiagnosed as GERD when it is really Eosinophilic Esophagitis (- a first cousin to Eosinophilic Bronchitis (asthma), and Eosinophilic Fungal Rhinosinusitis.)
  • If you want a functional test for gastric/peptic ulcers, and often for duodenal ulcers, simply have the patient on an empty stomach ingest 1 non-enteric coated tablet of bromelain or papain. If there is pain, then there is an ulcer. If there is no pain, then later that day or the next day on an empty stomach, swallow 2 tablets. If no reaction, then swallow 3 tablets some other time on an empty stomach, then as much as 4. If 4 tablets elicit no painful response, then go back to 1, then 2, then 3, then 4, completing 2 cycles of the proteolytic enzyme challenge. If there is never any pain, then there is no ulcer. The reason this test works is because the proteolytic enzymes digest meat – and an ulcerated stomach is literally raw meat.
  • Note also that hydrochloric acid will not exacerbate the pain of a stomach ulcer. It will exacerbate the pain of reflux esophagitis only because the stomach contents that are being refluxed are more acid, but not because the reflux is caused by excess acid. Rather, there is too little acid, so that even with the hydrochloric acid supplementation, the stomach will not empty in a timely manner.
  • The production of adequate hydrochloric acid in the stomach is dependent upon the formation of metabolically produced carbon dioxide. The carbon dioxide is converted by carbonic anhydrase to form carbonic acid, which in turn dissociates into bicarbonate ions and hydrogen ions. The hydrogen is transported into the stomach, as are a chloride ions, to form the stomach hydrochloric acid. – Insufficient carbon dioxide production for any reason (- thyroid insufficiency, Respiratory Alkalosis, Ketogenic or Anaerobic Metabolic Imbalances, insufficient intestinal flora to produce CO2 in the colon, etc.) will decrease stomach hydrochloric acid production – yielding hypochlorhydria and the consequent inefficient digestion and likely upper GI symptoms.]
  • Note that histamine parallels Parasympathetic activity, so that antihistamine drugs inhibit gastric secretion, and thus cause inefficient digestion and upper GI symptoms. Of course, this is the mechanism by which histamine 2 blocker drugs give temporary relief of upper GI symptoms while actually perpetuating the cause of those symptoms. The antihistamine drugs decrease stomach acid and prematurely empty the stomach, thus relieving symptoms – all the while they further decrease the essential production of hydrochloric acid, thus assuring that the symptoms will return as soon as the drug effect wears off. – In other words, the more a person takes these drugs, the more the person feels the need for them. (- Nice game for the drug companies to play.)
  • Many GERD symptoms are associated with excess nitric oxide. Excess nitric oxide will cause inappropriate relaxation of the gastroesophageal sphincter (as will excess parasympathetic nerve activity). Nutrition supplements designed to inhibit nitric oxide biosynthesis include melatonin, along with tryptophan, vitamin B6, folic acid, vitamin B12, methionine, and betaine. Research shows this supplementation achieves symptomatic relief in 100% of the patients with GERD, compared to only 66% symptom improvement in those taking proton pump inhibitors. – Another effective combination of supplements includes melatonin 6 mg, 5-HTP 100 mg, methionine 500 mg, betaine 100 mg, taurine 50 mg, riboflavin 1.7 mg, vitamin B6 0.8 mg, folic acid 400 mcg, and calcium 50 mg. Reduction of melatonin to 3 mg results in the return of symptoms.
Author: Life Enthusiast Staff