Yes.
Patients with gastric cancer are prone to calcium deficiency due to malabsorption from disease or surgery, so extra attention should be paid to calcium supplementation in the diet, and dairy products and leafy greens are both good dietary sources of calcium. In addition, some studies have found that the intake of milk and dairy products may not only reduce the risk of gastric cancer, but also help to reduce the risk of death in gastric cancer patients. Therefore, it is best for gastric cancer patients to consume the equivalent of 300 to 500 ml of milk daily, and lactose-free milk or yogurt can be considered for those who are lactose intolerant.