Lamb’s stomach extract b12 is effective in anemia caused by atrophic gastritis. Atrophic gastritis, i.e., long-term stimulation by Helicobacter pylori infection, alcohol, non-steroidal anti-inflammatory drugs, etc., there is atrophy of gastric mucosa and reduction of glands, which causes nausea, stomach pain, loss of appetite, stomach bloating and other symptoms. Atrophic gastritis can be divided into type A gastritis and type B gastritis, of which type A gastritis, also known as autoimmune gastritis, is mainly caused by autoimmune atrophy of the gastric body mucosa and reduction of the glands. In addition to the secretion of hydrochloric acid, the cells of the gastric body glandular lining also secrete a kind of mucus protein known as the endofactor, which can be combined with vitamin B12 to form a complex, ensuring that the latter is absorbed in the ileum. Type A atrophic gastritis due to the presence of autoantibodies, can lead to a reduction in the secretion of internal factors, affecting the effective absorption of vitamin B12, megaloblastic anemia, at this time to take lamb’s stomach extract b12, to improve the anemia, nutrient nerves have a certain therapeutic effect. Gastric mucosal bleeding patients are prohibited, allergic to the product is prohibited. Lamb’s stomach extract b12 should be taken under the guidance of a doctor, not unauthorized use of drugs.