Large meals and no meat growth are common in people with gastrointestinal malabsorption. It can also be seen in endocrine diseases such as hyperthyroidism, and is also related to obesity and genetics. Most people who can eat but do not grow meat suffer from digestive tract diseases, such as gastritis, gastric ulcer, chronic colitis, irritable bowel syndrome, etc. In Chinese medicine, the main consideration is weakness of the spleen and stomach and poor digestion and absorption. If suffering from several of these diseases, it is recommended to actively regulate the gastrointestinal tract. In patients with irritable bowel syndrome, for example, diarrhea often occurs after eating fatty foods or high-fat diet. Most of the diarrhea is transient, and most of it is relieved by stooling. It is recommended to use medication reasonably under the guidance of a doctor, and the representative drugs are mainly rectified intestine and probiotics. It is recommended to participate in physical exercise to promote gastrointestinal peristalsis, which is conducive to the digestion and absorption of food in the gastrointestinal tract. For those patients who have large meals and lose weight, it is recommended to check thyroid function as well as blood sugar to exclude the possibility of hyperthyroidism and diabetes. The third condition is seen in patients with wasting diseases, such as tuberculosis, tumors, etc. Therefore, it is best to go to the hospital to clarify the cause of significant weight loss in a short period of time.