Gastrin 0.69 is not normal and indicates a low level of gastrin. Gastrin is a gastrointestinal hormone, mainly secreted by G cells. It has the functions of stimulating the proliferation of gastric mucosa cells, improving the secretion function of gastric wall cells and main cells, stimulating the movement of stomach and intestines, delaying the emptying of stomach, and promoting the secretion of pancreatic fluid, bile and intestinal fluid. The value of gastrin can reflect the secretion function and quantity of G-cells, which can help to understand the secretion of gastric acid and determine the severity of gastric conditions, and help to diagnose and prevent some diseases. Its normal value is 15-105 ng/L. 1. Low: suggests possible B-type atrophic gastritis, gastroesophageal reflux, after gastrectomy. 2. High: suggesting possible gastrinoma, chronic renal failure, etc. It is recommended that the patient undergoes relevant examinations in the hospital to clarify the cause of the disease and then follow the doctor’s instructions to standardize the treatment.