Slow digestion at the age of 40 is usually considered to be caused by non-disease factors such as diet, or disease factors such as gastric diseases and endocrine diseases, which need to be examined to clarify the cause of the disease and treat the symptoms. 1. Non-disease factors: It is mainly considered that daily overeating, or frequent consumption of indigestible food or food with high fat content, which aggravates the digestive burden of the stomach, and lack of exercise, causing insufficient gastric power, resulting in the symptoms of slow digestion of the stomach. 2. Stomach diseases: If you are prone to acid reflux, heartburn and bloating in your daily life, consider that gastritis, gastric polyps and other gastric diseases are related to the gastric glands, which will affect the secretion function of the gastric glands and trigger the symptoms of slow digestion. 3. Endocrine diseases: if the patient’s daily life, poor mental state, memory loss and other symptoms, can not be excluded from the hypothyroidism, will affect the body’s metabolic function, triggering slow digestion. It is necessary to further improve the thyroid function laboratory tests to clarify. Forty years of age is a period of rapid weight gain for many male and female patients, and it is necessary to improve daily dietary habits. At the same time, the current trend of digestive tract tumors is young, combined with anemia, wasting and other alarm symptoms, be alert to digestive tract tumors. If the symptoms are serious, you need to go to the hospital in time to find the cause of the disease and give targeted treatment.