“First hungry and eat, do not make full; first thirsty and drink, do not make too much to drink. Food wants to number and less, do not want to be more than one.” This phrase is from the book “Drinking and Dining” written by Khu Si Hui, a famous food and health expert in the Yuan Dynasty. It means, don’t wait until you are very hungry to eat, and don’t wait until you are very thirsty to drink water. This is because, “very hungry and eat and too full, knot accumulation. Extremely thirsty and drink and too much, into phlegm addiction. It can be seen, very hungry and very thirsty when overeating is very bad for the body. Ni Zheng, chief physician of the Department of Treatment and Prevention at Nanjing Hospital of Integrative Medicine, said that many office workers are in a hurry in the morning and often do not have time to eat breakfast, thinking that “it does not matter if they are not hungry anyway”. When the busy, hungry to go to eat a big meal. Over time, these people’s bodies will deteriorate, gastrointestinal diseases, endocrine diseases and so on. Food stays in the stomach for about 4 to 5 hours, when we feel hungry, the food in the stomach has actually been emptied, but at this time gastric juice will still be “digestive” of the gastric mucosa, which is likely to cause gastritis and peptic ulcers. In addition, often hunger without food, but also triggered by hypoglycemia, serious will cause a coma. Many office workers also have a situation: the morning received a glass of water, until the end of the day did not bother to drink a sip, but once the body is dehydrated, will make a person’s spirit, dry mouth, weakness, low work efficiency, serious will also affect the liver, kidney function, so that the accumulation of toxic substances, so that a variety of diseases can take advantage of the situation. Especially people with cardiovascular disease, too little water intake will lead to insufficient blood volume, blood concentration, increased blood viscosity, easily induced cerebral thrombosis. In addition, people are too hungry, easy to over-eating; too thirsty, easy to over-drink. As Tao Hongjing said in his book “Nourishing Life Extension” volume on the “food commandments”: “I am afraid that hunger is food, food will be more; Sheng thirst is drink, drink will be too much.” So, how to eat the most scientific? The ancients have long given the answer, as mentioned at the beginning of the article “food desire number and less, do not want to ton and more”, not hungry to supplement some nutrition and energy, to do less food and more meals, do not wait for hunger can not, thirst can not then eat and drink, to lay a hidden health risks.