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Can black coffee hurt the stomach and add milk to improve?

Published: 2026-02-23 Author: World Gafei

Last Updated: 2026/02/23, Coffee health: some people drink coffee will feel uncomfortable in the stomach, how to avoid? Avoid drinking coffee to hurt the stomach, it is better to drink after meals, sometimes, after drinking coffee, there are symptoms such as stomachache, heartburn, stomachache, so there is often a saying that "black coffee hurts the stomach". Can it be improved if sugar or milk is added? The answer is no. Hong Zhisheng, a gastroenterologist at Cathay Pacific Hospital, pointed out that in coffee

Coffee health: some people drink coffee will feel uncomfortable in the stomach, how to avoid?

Avoid damaging your stomach by drinking coffee. It's better to drink it after meals.

Sometimes, symptoms such as stomach tightness, heartburn and stomachache occur after drinking coffee, so there is often a saying that "black coffee hurts the stomach". Can it be improved if sugar or milk is added? The answer is no. Hong Zhisheng, a gastroenterologist at Cathay Pacific Hospital, points out that caffeine in coffee can cause a large amount of gastric acid secretion and cause discomfort. in addition, caffeine also stimulates the dilator muscle at the lower end of the esophagus, making it more relaxed, leading to gastroesophageal reflux, whether with milk or sugar. In addition to caffeine, in recent years, scientists have also found that coffee contains a variety of other chemicals that stimulate stomach acid secretion. In the course of the study, an active substance, NMP (N-methylpyridium), was accidentally found, which can block the ability of stomach cells to produce hydrochloric acid and reduce stomach discomfort. Interestingly, NMP does not exist in raw coffee beans and can only be produced through the roasting process, and the deeper the roast, the higher the content, which means that drinking deep-roasted coffee is less harmful to the stomach. In addition, the content of acid which is easy to cause stomach discomfort is less in deep-baked beans.

Veronika Somoza, a professor in the Department of Nutrition and Physiology at the University of Vienna in Austria, pointed out that the content of NMP in deep-roasted coffee may be more than twice that in light-roasted coffee.

Change the time to drink coffee, do not drink coffee on an empty stomach, may be a good way, not only less harmful to the stomach, caffeine stimulates gastric acid secretion more conducive to digestion, killing two birds with one stone.

The above information is for reference only.

Source: Common Health