In the case of water shortage, the blood in the body will become more and more viscous, circulation will become difficult, blood pressure will drop, heart rate will increase rapidly, and people will soon be unable to support it. If there is water, even if there is no food, the survival time may exceed 7 days. However, how many days it can last varies from person to person. For example, a person's psychological state, a person's fat and thin, a person's health.
Psychologists say that how long a person can live without eating or drinking depends largely on his willpower to live. Indian Mahatma Gandhi went on a hunger strike for three weeks in the 1970s, and some people who didn't want to live could end their lives in less than two weeks. So in this extreme situation, how long people can live, and people's desire to survive can play a great role.
Some time ago, Liang Shengyue and Liu Chenjun from Taiwan Province Province of China climbed the Himalayas in Nepal and were trapped in the valley after an avalanche. From March 9 to April 26, he was found in Nachate Valley and was trapped for nearly 50 days. When he was discovered, the young man Liang Shengyue was conscious and could speak, but he was weak and gradually recovered after treatment. The girl Liu Chenjun died three days before she was found. They don't just drink water, they don't eat for 50 days. They still had some dry food 20 days ago, and after 20 days, there was no food at all. In other words, young people and girls are trapped in the valley without water and food. The boy lived for 30 days, but the girl didn't. Trapped in the valley, people are in a pessimistic and desperate mood, and it is difficult to persist for 30 days.
It was previously reported that several students were traveling in the mountains and fell into a cave. A month later, people found these people. Only one person was still alive, because there were some chocolates in this person's pocket. This person lived for 30 days on the water and chocolate in the cave, but he had multiple organ failure, and others could not live for 30 days. Experiments in this unexpected situation prove that people can only live less than 30 days in fear and despair by drinking water without eating.
Apart from psychological factors, how long can you persist without eating or drinking water? Mainly depends on a person's physical condition and fatness. The news that an anorexic girl in Australia almost died without eating for seven days in a row was circulated in the domestic media. Allen, an Australian girl, couldn't bear the ridicule of her friends and went on a diet to lose weight. She completely cut off all normal food and only ate fruit salad and boiled vegetables with salt. In just a few months, she lost nearly 40 kilograms. Finally 1 week, all food is completely banned and water is rarely drunk. Finally, the body suddenly began to twitch, severe convulsions, and was taken to the hospital. In the case of extreme thinness and weakness, it is actually very difficult to persist for seven days.
There are also some examples of dieting in history, such as1Irish hunger strike in the early 1980s, 198010/October 27th, when the first hunger strike began, the hunger strikers ate nothing but water and salt. No one died after a 53-day hunger strike. 1 981March1day, 23 militants participated in the second hunger strike, and on May 5, they died on the 66th day of the hunger strike led by Sands. Later, on July 3 1 day and early August, several hunger strikers died one after another. In the end, a total of 10 hunger strikers died, with the shortest death time of 46 days and the longest death time of 73 days.
Relatively speaking, fat people are more resistant than thin people, because the human carbohydrate reserve is only 1 day. Generally speaking, there is no surplus energy storage in protein. In the long-term hunger state where the supply of energy materials is completely cut off, fat has almost become the only energy source. In the absence of other complications, the survival time of a person who can endure hunger depends on the size of the triglyceride (fat) bank.
According to research, a well-nourished person weighing 70kg has a total energy reserve of about 16 1000 kcal. According to the different energy consumption levels of human body, if the energy consumption is 1600 to 6000 calories every 24 hours, the total energy reserve can meet the needs of about 30- 100 days, that is, 1-3 months.
However, don't think that people should go on a diet to lose weight because they can last so long without eating. Dieting will do all kinds of harm to your health. People who fast usually die of multiple system and organ failure. Generally speaking, organs will go wrong in the following order.
Brain: Chronic malnutrition caused by dieting causes hypoglycemia, and nerve cells will be relatively ischemic and anoxic, so memory and thinking ability will decline.
Liver: The synthesis of serum protein decreased, and the level of circulating protein decreased.
Kidney: hypofunction causes general fatigue, listlessness and decreased libido, and a few people may have edema of both lower limbs in different degrees.
Heart: Blood output and myocardial contractility decrease.
Stomach: Gastric acid is still secreted. At this time, there is no food for the stomach to digest, and gastric acid begins to stimulate the stomach, thus causing diseases such as chronic gastritis and gastric ulcer.