Gastric acid trouble

The function of gastric juice is to assist in digestion and kill bacteria. The acidity of the stomach is an important barrier against bacterial infection, flagellants, and worms. Symptoms of malfunction are heartburn, gas, stomach ache, and dyspepsia.

The gastric mucosa can produce a very strong hydrochloric acid. Chemical substances, nervous signals, and hormones regulate the production of acid which is activated by the hormone gastrin and by signals from the vagus nerve which originates in the medulla oblongata of the brainstem. These signals liberate a substance from cells in the gastric mucosal cells - histamin - which is the most important initiator of gastric acid production.

The whole process is initiated when we eat. Just the anticipation, sight, smell, and taste of food start off the production of gastric acid. This is mediated through the vagus nerve. When the food enters the stomach, it stimulates the gastric mucosa both chemically and mechanically, e.g. by expanding the stomach.

Especially the protein part of the food promotes the production and liberation of the hormone gastrin which stimulates the production of acid. Once the food enters the upper part of the small intestine, both the production of gastrin and other hormone-like substances (pepsins) are stimulated and this further promotes the production of acid.

Gastric acid is also produced between meals and at night. This production has nothing to do with meals; it reaches a peak around midnight and is lowest around 7 am.

Consumption of both regular and decaffeinated coffee stimulates the production of gastric acid by liberating gastrin. Also beer and wine increase the production of gastric acid. When there is an adequate amount of acid in the stomach or if acid enters the duodenum, the productin of acid is inhibited. Fat in the duodenum has the same effect. Too much sugar in the blood and sweet drinks also inhibit the production of gastric acid.

Together with the digestive enzyme pepsin, gastric acid breaks down the food which thereafter enters the duodenum and moves further on to the rest of the small intestine where bile acids and digestive enzymes from the pancreas and small intestine take care of the further breakdown. The pepsin is produced when the gastric acid cleaves precursor - pepsinogens - into active pepsin which works best at an acid pH below 4.

Starchy foods such as bread, pasta, bisquits, and potatoes elevate the pH which results in problems with the breakdown and digestion of protein-rich foods like meat, poultry, eggs, and dairy products. This is the reason for the recommendation of a diet with separation of foodstuffs - also called the Fit for Life diet - in which these foods must not be eaten together but can be combined with neutral foods such as vegetables and salad plus fatty foods.

The production of gastric acid can be measured between meals and after stimulation with the hormone Pentagastrin. Especially in cases where there is suspicion of a large over-production of gastric acid in the Zollinger-Ellison syndrome and in cases where there is suspicion of a reduced gastric acid production, it could be interesting to measure the amount of gastric acid.


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1 tbsp. of raw oatmeal can be chewed 3 times a day if you suffer from too much gastric acid - the effect is rapid.

Potatoes are also effective against too much gastric acid: finely grate and squeeze 1 raw potato. The juice is diluted with 2 - 3 parts of warm water. This juice is prepared fresh every time gastric acid problems appear. The juice is to be drunk 3 times a day; on an empty stomach in the morning, at noon before lunch, and in the evening before going to bed. Moreover, the effect can be increased by adding a little white clay to the potato juice. NB! Be aware of any allergy towards Solanaceae in which potatoes can be a problem.

The concentrated cheese whey of Molkosan normalizes the gastric acid production in case of too little or too much gastric acid.

Relevant herbs for too much gastric acid:
  • Aloe vera - pure juice without additives - for an acidic digestive environment.
  • Centaury, Centaurii minoris/Eruthrea centaurium, as a tea or extract has a beneficial effect on gastric acid.
  • Chamomile, Chamaemelum nobile/Chamomilla recutica, as a tea or tincture normalizes the digestion.
For too little gastric acid:
  • Centaury, Centaurii minoris/Eruthrea centaurium, has a beneficial effect on gastric acid - both as a tea and as extract.
  • Dog rose, rosa canina.
  • Gentian, Gentiana lutea, stimulates the transport of gastric acid and leads the stream of digestive juices more rapidly on through the gastro-intestinal system.
  • Peppermint, Mentha piperita, has a promotive effect on digestion.
Other things:
  • Betaine hydrochloride or trimethylglycine hydrochloride (Betaine) in the form of tablets at each meal - not before or after!
  • Molkosan normalizes the gastric acid production: 1 - 2 tsp. in water 3 times a day.
  • Vitamin B3 - Nicotinic acid; not nicotinamide - promotes the production of gastric acid.


Peppermint, Mentha piperita, can in some cases irritate the intestinal mucosa and should not be used if you have a tendency to gastric ulcers.


Also see "Constipation", "Digestive problems", and "Gastric ulcer".

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