Oyster shells contain a large amount of calcium carbonate and calcium phosphate. The efficacy of oyster shells is described in detail in my country's classical medical book "Chinese Pharmacopoeia". Oyster shells have an astringent effect, and when used appropriately, they can treat stomachaches. If people have excessive stomach acid, it is also very suitable for everyone to eat oyster shells in moderation. Nowadays, oyster shells are also added to many food additives. For patients with duodenal ulcer, reasonable consumption of oyster shells can also inhibit gastric acid secretion. Oyster shells are also very popular for their softening and antipyretic properties. It can also treat heart palpitations and insomnia. If female friends have breast discomfort, it is also necessary to use oyster shells reasonably in this case. What are the functions and functions of oyster shells? From the article, you can see that oyster shells have many benefits. It softens hard knots and can also treat stomach ailments. Reasonable use of oyster shells can inhibit gastric acid secretion. However, friends with sensitive constitutions need to be particularly careful when actually using oyster shells, and everyone must do moisture-proof treatment when storing them. Because this type of material is easily affected by moisture.