When patients with gastrointestinal disease go to the doctor, doctors usually tell them to chew slowly when eating and not to gobble. So why do doctors tell patients this? Because chewing and swallowing slowly will promote the digestion and absorption of food. The digestive enzymes in the saliva will produce digestive effects and break down the food during this process, thus making the food sent to the stomach fine and soft and reducing the direct burden of the food on the stomach. Saliva is a natural food digestive agent and a natural “cancer prevention and disease prevention agent”, which plays a very important role in the process of food digestion. If patients do not chew slowly during the process of eating, but gobble slowly, they will miss the digestion steps in the mouth and cannot achieve good digestion. Inadequate chewing of food in the mouth will also increase the burden on the stomach and make it susceptible to gastric diseases such as gastritis, gastric ulcers or others. In addition, hard food can easily get stuck in the esophagus or throat due to swallowing too fast, and eating too fast can cause flatulence. Therefore, for patients with weak gastrointestinal function, it is especially important to chew and swallow slowly, especially when eating pancakes and other foods without fully chewing and swallowing without fully digesting, which can easily hurt the gastric mucosa and increase the burden on the stomach, which will lead to gastric disease over time. In addition, chew and swallow the following benefits: First, to protect the gastrointestinal: chew and swallow can increase the amount of saliva secretion, saliva in the protein into the stomach after the reaction in the stomach to generate a protein film, the stomach to play a protective role. Therefore, people who chew and swallow slowly while eating are generally less likely to get peptic ulcer disease. Second, can prevent dental disease: chew slowly can fully regulate the physiological function of the mouth. Chewing can promote keratin changes on the surface of the gums, accelerate blood circulation and improve the ability of the gums to resist disease. As food is repeatedly chewed in the mouth, the tooth surface is repeatedly rinsed by saliva, which enhances the self-cleaning effect of the tooth surface and helps prevent dental diseases. Third, dieting and weight loss: food into the body, blood sugar will rise to a certain level, the brain appetite center will send a signal to stop eating. However, eating too fast, when the brain issued a signal to stop eating, often have eaten too much food, and chew slowly, is conducive to dieting and weight loss. Fourth, can beauty: chewing promotes facial muscle activity, improves local blood circulation, improves the skin metabolic activity, thereby reducing facial wrinkles, rosy complexion. V. Delay brain decline: chew slowly, the facial muscles can be exercised and exercise, but also to increase the vitality of the brain, to prevent the role of brain aging and dementia. Six, conducive to cancer prevention: medical doctors found that saliva in the oxidase and peroxidase can eliminate the toxicity of certain carcinogenic substances, when certain foods containing carcinogenic substances into the body, saliva is the body’s first line of defense. Some medical doctors believe that the higher incidence of cancer among middle-aged and elderly people is related to their poor chewing ability, and they believe that cultivating good eating habits, chewing slowly, and chewing each mouthful of rice 30 times (about 30 seconds) can help eliminate carcinogens in food. Seven, to help longevity: research has confirmed that the human salivary glands in the secretion of saliva, but also secrete a parotid hormone, this parotid hormone can be reabsorbed into the body into the bloodstream, it has a role in resisting the aging of the body tissue. Chewing and swallowing slowly can stimulate the secretion of saliva, and the secretion and absorption of parotid hormones will also increase as saliva secretion increases, thus slowing down the body’s aging process.