Multiple myeloma patients can drink old duck soup in moderation. The following are elaborated from two aspects of food nutrition and precautions. 1. Duck meat has high protein content, moderate fat content, contains calcium, iron, vitamin B, vitamin E, unsaturated fatty acids and other nutrients, and is rich in niacin, so duck meat is rich in nutrients, suitable for patients to consume in moderation. 2. It should be noted that the salt in old duck soup should not be too much to avoid excessive salt intake. Multiple myeloma patients should pay attention to the nutritional balance of diet, avoiding indigestion caused by consuming a large amount of old duck soup, and should consume more easy-to-digest food, food rich in high-quality protein and fresh vegetables and fruits to ensure sufficient nutrition. Multiple myeloma patients need to receive regular treatment under the guidance of a physician, you can drink a moderate amount of old duck soup, pay attention not to consume too much.