The main component of gastric acid is hydrochloric acid.
Gastric acid, i.e. hydrochloric acid secreted by the stomach, consists of free acid and protein-bound bound bound acid, of which free acid is the main form of existence, and the total concentration of both in the gastric juice is called total acidity. Gastric acid is secreted by the mural cells of the gastric glands, and the amount of its discharge is determined mainly by the number and functional status of the mural cells.
Mural cells are rich in carbonic anhydrase, which catalyzes the cellular metabolism of bicarbonate ions to produce carbon dioxide and water, which combine to form bicarbonate, which is catalyzed by carbonic anhydrase and dissociates into hydrogen ions and bicarbonate ions. Chloride ions are secreted by exchange with bicarbonate ions, which enter the lumen of the tubules and form hydrochloric acid with hydrogen ions.
Stomach acid has the function of aiding digestion, but if it is secreted abnormally, it can also cause digestive disorders. Therefore, you should pay attention to a reasonable diet in your daily life and avoid eating too oily, spicy and stimulating foods.