Puerh tea contains more polyphenols, the mucous membrane of the stomach and intestines has a certain astringent effect, if you have constipation, drink more constipation will be more serious.
Pu-erh tea contains fluoride, which will combine with calcium ions to form calcium fluoride and inhibit the absorption of calcium in the duodenum. Long-term use of pu-erh tea as a daily drink may lead to calcium deficiency and osteoporosis, making it difficult to recover from bone fractures. Therefore, young children, pregnant women and the elderly should not drink more.
The theophylline contained in Pu-erh tea will reduce the activity of phosphatidylcholinesterase and make the cells of the stomach lining secrete a lot of gastric acid. Excessive stomach acid will stimulate the healing of the ulcer surface, but also offset the efficacy of certain antacid drugs, not conducive to recovery.