Tea contains a large amount of theophylline, tea polyphenols, yeast can not neutralize stomach acid, for the following reasons: 1, theophylline: theophylline not only can not neutralize stomach acid, but will make the stomach wall cells secrete a lot of stomach acid, heartburn, acid reflux and other symptoms; 2, tea polyphenols: can stimulate the gastric mucosa cells, leading to atrophy of the gastric mucosa glands, chronic atrophic gastritis and other symptoms, resulting in reduced secretion of gastric acid, indigestion, Gastric mucosa atypical hyperplasia, gastric cancer, etc.; 3, most black tea made by fermentation, which produces yeast to promote digestion, promote the role of gastric acid secretion, not to mention the neutralization of gastric acid.