1. How long can an old man live without food or water?

When a person just stops eating, glycogen stored in the liver is first broken down into glucose to provide energy for the body. After three days, the liver glycogen is exhausted, which needs to activate the adipose tissue in the body. After a period of time (the specific length of this period depends on the individual's fatness and thinness, so fat people also have an advantage), after the fat is exhausted, protein will be consumed, and amino acids will be further oxidized to provide energy. During this period, protein in muscle will be mainly decomposed. In the long run, the human body will have some reactions, such as dizziness, headache and weakness. In the long run, the internal organs begin to fail, further leading to death. From the above, it can be seen that the survival time of each individual in a state of complete hunger strike is uncertain, depending on the general health status and fat reserve of a particular person. Generally speaking, people should be able to survive 1 to 2 weeks without eating or drinking.

2. What should the elderly do if they don't eat?

The elderly are prone to loss of appetite due to the decline of various functions. It is suggested that the elderly can properly cook light and digestible meals and steam fruits before eating, so as to persuade them to walk more and slowly, promote functional exercise and increase appetite. At the same time, you can eat some zinc and selenium tablets, which can regulate the stomach more effectively, improve your appetite and improve your aversion to eating.

3. How do the elderly maintain themselves?

3. 1, develop good personal habits: no smoking or drinking, moderate, go to bed early and get up early for seven to eight hours, balance nutrition, and pay attention to the intake of fresh vegetables and fruits. The diet should be warm, cooked and soft, and avoid sticking hard and cold. If possible, you can often eat some honey.

3.2. Appropriate physical exercise: You can do some qigong, unarmed exercise, jogging, playing Tai Ji Chuan, etc. Exercise your bones and muscles and be full of energy.

The reason why old people don't like eating.

1, the body suddenly became obviously emaciated.

If the elderly suddenly lose appetite, don't like eating, lose weight obviously and lose weight obviously within a period of time, it depends on whether there are digestive system diseases. They should go to the hospital for occult blood test, blood test and upper digestive tract test in time to prevent problems before they happen.

2, indigestion and abdominal pain and vomiting.

If the elderly don't like eating for a long time, they are accompanied by indigestion. If they are accompanied by abdominal pain, nausea and vomiting, they may be ulcerative diseases. In particular, they should be wary of digestive tract cancer.

3. Sudden depression and irritability

Some old people are depressed and have become eccentric and withdrawn. Such people often have the hidden danger of loss of appetite. They are not interested in the things around them. If they are slightly unhappy, they will lose their temper, insomnia, paranoia and anxiety, which is often related to functional dyspepsia.

4. Other disease factors have influence on appetite.

When you are old, you don't like to eat, which will be associated with gastrointestinal problems. In addition, the initial symptoms of liver disease will also lead to the elderly not liking to eat for a long time. Moreover, the loss of appetite caused by liver disease is often extreme, and diseases such as kidney disease, insufficient thyroid skills, heart disease and brain tumor will also affect their appetite.

Dietary precautions for the elderly

1, not greedy for meat

Too much meat fat in the diet of the elderly will cause imbalance in nutritional metabolism, and it is easy to suffer from hypercholesterolemia and hyperlipidemia, which is not conducive to the prevention and treatment of cardiovascular and cerebrovascular diseases.

2, not greedy for essence

Old people have long paid attention to eating white rice noodles. If they consume less cellulose, they will weaken intestinal peristalsis and be prone to constipation.

3. Not greedy

The gastrointestinal digestion and absorption function of the elderly is weak. If they eat hard or poorly cooked food, they are prone to indigestion or stomach trouble for a long time.

4. Not greedy.

Due to incomplete tooth loss, if the elderly eat fast and chew hard, it will increase the digestive burden of the stomach.

5. Not greedy

Old people should have an adequate diet. If they eat more food for a long time, it will increase the burden of digestion and absorption in gastrointestinal tract.

6, not greedy for wine

Drinking alcohol for a long time in the elderly will cause myocardial degeneration, lose normal elasticity and increase the burden on the heart.

7. Not greedy for salt

Excessive sodium intake in the elderly can easily lead to hypertension, stroke, heart disease and kidney deficiency.

8, not greedy for sweetness

Eating too many sweets in the elderly will cause dysfunction, which is not conducive to physical and mental health care.

9. Don't be greedy

Don't eat three meals too late, which is conducive to food digestion and rest after meals, and avoid food accumulation.

10, not greedy for heat

The diet of the elderly should be warm but not hot, and hot food is easy to damage the mouth, esophagus and stomach.