Cells within the stomach, known as the parietal cells, are responsible for the production and secretion of gastric acid. This acid is critical for breaking down food and for activating enzymes which are needed for digestion. On the other hand, too much stomach acid can cause an upset stomach and gastroesophageal reflux disease, which is the result of stomach acid refluxing out of the stomach and into the esophagus. Although there are prescription medications that can be used to reduce the production of stomach acid, the acid in the stomach can be settled naturally as well.
Eat smaller meals. Large meals are harder for the stomach to digest so more acid is produced by the parietal cells. Eating smaller meals can help keep the stomach from becoming upset and can also prevent gastroesophageal reflux disease, NetDoctor explains.
Eat complex carbohydrates. Complex carbohydrates, which can be found in pasta, starches and rice, can help tie up some of the excess acid in the stomach, HealthCastle explains. Make sure that you only eat small amounts of these foods as eating too much can stimulate acid production.
Consume antacids. Antacids are small tablets that are designed to be able to neutralize stomach acid. These products, which often contain calcium or magnesium hydroxide, can be purchased over the counter at most drug stores. Antacids can be taken as needed to help settle an upset stomach, but if they are used regularly, they can interfere with the absorption and metabolism of some drugs.
Consume alkaline foods. Alkaline foods include leafy, green vegetables such as spinach, lima beans and asparagus. Alkaline foods are able to neutralize acid and can naturally help settle a stomach, which has become upset by too much acid. Cabbage, carrots, pumpkin seeds, sunflower seeds, peas, lentils and vegetable broth, among other foods, can all help settle a stomach that has become upset due to acid production, EnergiseForLife.com notes.