Lead: eat nutrient supply is the best way to ensure that, if eating pure nutrients, or a parenteral nutrition, in theory, can guarantee the supply of human nutrition, but it is likely to harm the human body exist in a particular social group complex, and ultimately harm the body itself.
Modern nutrition tell us that human activity is the main energy from food carbohydrates and fats, the body is largely dependent on the structure and function of protein, and protein is an amino acid used by the body in food synthesis. In addition, the body will take a very small amount but essential minerals, vitamins in order to maintain the normal operation. All this we need to eat every day, from food intake. Because of fears about food safety, a lot of people, including organized businesses and research institutions are envisaged alternative food three meals a day with purified nutrients, or even simply do not eat. Just enter various nutrients from the vein on the line, technically, but need venipuncture or venous catheterization, which is nothing difficult. For patients in the patient's digestive tract can not tolerate food or nutrients, the nutrient solution by intravenous, has been practiced for many years.
Theoretically looks eat pure or pure nutrients intravenously nutrients it seems to be no problem, as long as we can forget the delicious and resist the temptation of food. But this theory seems to be no problem but ignored the interests of a group can not be ignored, and that is life in the bottom of the food chain, human intestinal flora in the large intestine reek a living. These bacteria begins at birth with us, until the old. There is no fetal intestinal bacteria after birth through the mother's birth canal, birth canal bacteria are swallowed baby, became the first batch of intestinal flora. After birth through breastfeeding, and contact with the surrounding environment, receiving more flora. Baby stuff in the first three months of the immune system to default to all of the contact itself, these bacteria colonization down thrived here until the adult will not be much change.
Intestinal flora living in the intestine can not be removed, because the immune system to tolerate them, to destroy them will not start the inflammatory response. But more importantly, they are good for our health. Our daily intake of food, and some can not rely on the body's own digestion enzymes to digest these substances, but the presence of bacteria, give the body extra energy. Perhaps subsistence society these energies insignificant, but not conducive to weight loss, but if it is in the famine years, the energy is not an extra, but a life and death decision. No intestinal bacteria, vitamins B and K acquisition will be very problematic. Meanwhile intestinal flora also constitutes a defense other foreign bacteria barrier. If the patient is long-term use of broad-spectrum antibiotics, the intestinal flora destroyed, some of the usual trouble impossible bacteria can cause serious infections.
Intestinal flora beneficial to human reason, of course, not because of their selfless dedication, but because they are also beneficiaries. The residue remaining after the digestion and absorption of food, there are a lot of intestinal cell death every day, seemingly useless to humans, but it is delicious bacteria. Although people on their own gut despised, often used to describe the sewer, but it is the intestinal bacteria iron rice bowl. Compared to some subtle and underhanded to peer, such as Vibrio cholerae, Clostridium botulinum, etc., the normal intestinal flora seem greedy comfortable, no passion, but because they are human and successful cooperation, enjoying live, live more than life.
Back to the beginning of the assumption that if people eat daily nutrients, while assuming that these pure nutrients to all qualified in the stomach and small intestine is absorbed, will not have any residual reaches the large intestine, the intestinal bacteria that would otherwise require a lot of food scraps to survive groups will be famine. Some bacteria are directly starvation, while others like gold digger husband refused to low- fertility as spores turn into inactive status. In the first few days inside, people will feel very uncomfortable, such as headache, nausea, vomiting, palpitation and so on. This is because a large number of intestinal bacteria die, the release of bacterial endotoxin is absorbed lead. Not all bacteria are killed and the proportion of various bacteria normally fight each other to keep the result of the fight, when some bacteria starve to death when, in addition to some bacteria but because of less competition and a meteoric rise, and this condition is developed in bacteria on the human body are often not friendly. Like that would otherwise require a large number of coolies city all of a sudden mechanization, honest coolies would starve because they can not work, and some coolies had diverted when the robber.
So, eating pure nutrient or intravenous nutrition seemingly sophisticated, but not suitable for our body. Like the social model hard to move to a utopia everyone is rushing food and clothing, and always the same country will be internal and external. Results from each other and with human bacteria is not to demonstrate the harmony between man and nature, but rather a long-term evolution, not so not.
If we do not have to think twice how bacteria like? Although they coexist with humans for millions of years, but after my race their hearts must be different, in fact, even if the medicine will be named as the normal intestinal flora, there are some weak or when the body immune system dysfunction while, adding insult to injury looting guy. Suppose, it can only be assumed that there is really such a future, no bacteria of the world, if you can not eat it? I'm afraid not, because the human body itself is difficult to accept such a huge change.
The human digestive tract to digest food relies on the secretion of large amounts of liquid, these liquids are some acid, some alkaline, which contains a variety of digestive enzymes. When people eat, ready to eat even when a large number of secretion of digestive juices. Even without eating, a small amount of secretion of digestive juice will be continued. Our digestive essence, and the food we eat is no different, are composed of biological macromolecules, digestive juices to digest the food also able to digest our own organization. Under normal circumstances, digestion was used to digest food, while the inner surface of the digestive tract also secrete a lot of mucus to protect themselves. Without a sufficient amount of food to "neutralize" digestive juices, while reducing mucus production, digestion will damage our own digestive tract, especially the digestive tract has been damaged. Hunger will aggravate peptic ulcer disease, peptic ulcer bleeding patients in the past will not let the patient to eat, but now it has been found that an early start to eat but is conducive to the healing of ulcers.
In addition to digestion, our liver will secrete large amounts of bile, helping the absorption of fat. The bile secreted by the liver is completely planned economy, there is no matter how much the market each day, secrete so much. Even if not required, even bile output channel is blocked, it will continue to secrete. Temporary unused, temporarily stored in the gallbladder, when necessary, gastrointestinal tract cells through the secretion of cholecystokinin, notify the gallbladder bile output. If you have been without food, bile has been stored it, gall bladder capacity is very limited, so only the concentrated bile, when it exceeds the limits of time and concentrated on the formation of gallstones. Therefore, those people who diet to lose weight, the significantly higher incidence of gallstones.
In short, although we now have a variety of products of pure nutrients, and even do not need to orally injected directly into the blood vein nutrients, but whether it is from an economic point of view, or the health point of view, we should all continue to eat.
lw56102 (Author: lw56102)
This article has copyright by the daily newspaper http://zhidao.baidu.com/daily Baidu know or provided by content partners authorized without written permission Daily Baidu know, any third party individual or organization may not be copied, reproduced excerpts, mirrors or in any other way use. Baidu know the daily chase responsibility and rights reserved. Contact mailbox zhidaoribao@baidu.com
Article Source: Baidu know daily (http://zhidao.baidu.com/daily)
Original link: http: //zhidao.baidu.com/daily/view id = 1891?