Lead: About grams of food there are many legends, before I doubted. Here to share my participate Nutrition Month Nutrition Society of Science and Technology of experience last year. At that time, as the Chinese Nutrition Society, chairman of Ge Yu teacher made a report about the grams of food. Very impressed by Professor Ge Yu in the report clearly tells us: "food phase" There is no adequate scientific basis.
People tend to exist for some food diet taboos in everyday life, the so-called "food phase g" is absolutely not eat, but in fact, between grams of food is not as people imagine so terrible, order diet, cooking methods, individual differences, and so on a number of factors will lead to some adverse reactions after eating, if only a one-sided to two or more kinds of food is defined as "phase grams of food" it is unscientific.
Produce grams of food and even cause death to say life is likely to cause coincidence repeated the baseless assertion, or contamination of food poisoning, or produce some special physical food allergies, food is not natural "mutual restraint." For example, winter fasting to eat persimmons, eat crabs after eating, plus a little vinegar, if it itself has stomach problems, so after eating the body would be adversely affected. Once this phenomenon occurs, people will mistake it for crab and persimmon with g, in fact, fasting eat persimmons or cold food itself can cause physical discomfort.
In addition, any kind of food contains thousands of nutrients, and the interactions between food nutrients is an objective reality, this effect can be offset by a balanced diet, but it can not simply be classified as "mutual restraint." For example, it is generally believed spinach and tofu can not eat, because it will produce calcium oxalate After the oxalic acid contained in spinach and tofu contain binding, the body will produce side effects. In fact the two were eating only food will affect the absorption of calcium, but not two kinds of food grams. To solve this problem is very simple, because spinach contains oxalic acid is dissolved in water, as long as the hot water boiled spinach and tofu stew and then eat does not exist any problem.
"Grams of food." What are the problems?
Mainly in the following aspects [1]:
1. The lack of scientific basis for the theory, can not be trusted. Like eating carrot + turnip lead to sepsis, horse meat and cuttlefish + + fungus cause cholera eggplant, bean curd + honey cause deafness, lead poisoning chrysanthemum + chicken, yogurt + banana carcinogenic, etc. Most of these foods are rich in nutrients, and results grams caused no connection.
2. The reference to traditional Chinese medicine theory to explain, there are doubts. Like eating pumpkin + mutton cause chest tightness, abdominal distension, citing pumpkin deficiency mutton hot tonic. In contrast, high meat protein content, rich in minerals and vitamins, nutrients pumpkin more comprehensive, especially high carotene content, rich in sugars and starches. Moreover, the modern nutrition studies have shown that eating pumpkin control efficacy of hypertension, diabetes and liver disease and so on.
3. The absence of grams, the opposite can be fit and healthy. As chestnuts + beef + chestnut duck and other high starch content, chestnuts, and rich in dietary fiber, or the benefits to the human body. As for the duck, now generally regarded as a source of high quality protein.
4. minimal effects on the body. As meat + tea cause indigestion, constipation, contained in tea can indeed trample acid and protein binding, generate a convergence of boots acid protein, it is not conducive to the absorption of the protein. But the amount of acid in tea trample is less, can bubble out of the acid in the tea boots and even less, and the amount of protein intake per day compared to the human body, the role of these boots acids are Again cucumber ten cauliflower destroy vitamin C (ascorbic acid), ascorbic acid enzyme cooked basic ceased to exist, and how it destroyed?
5. little knowledge of nutrition-related knowledge. Like tea, eggs, food reduced protein, iron absorption, iron is not the main source of eggs, meat is, and eggs in iron absorption rate of only 3%, because of the high egg yolk phosphoprotein hinder iron absorption, and Tea + vinegar with carrot lead to vitamin a is destroyed, mainly carrots contain carotene, vitamin a that is original, is fat-soluble vitamins, water-soluble and vinegar is a weak acid, and carrots will not react, there was no destruction of vitamins a question.
6. The concept of confusion, with two types of food has nothing to do with food. Such as beer + bacon cause carcinogenic polycyclic aromatic substance smoked bacon in the process, produce, and cyclization, condensation polymerization reaction heat generated benzo flowers and other harmful substances on the human body has a strong carcinogenic effect . Therefore, the cause is not carcinogenic relationship with beer.
Experiments tell you, "food phase" do not fly
Professor Zheng Ji of Nanjing Institute of Biology has done on the "food phase," said the experiment. He collected of Legend grams of food food 184 group, select the most common 14 groups of tests, including green onions and honey, sweet potatoes and bananas, green beans and vinegar, egg and sugar, peanut and cucumber, green beans and caramel, crab and persimmon, pomegranate and crab, crab and Nepeta, crab and Wujiapi wine, carp and licorice, crucian carp and Nepeta, beef and corn, turtle and purslane, respectively rats, monkeys and dogs tested, including seven pairs of food by Professor Zheng himself and another researcher doing human experiments. After two days through the tasting homemade production, observe test eater expression, behavior, body temperature, and whether the appearance of stool frequency difference, did not find any food group appears grams phenomenon [2].
From 2008 to 2009, the Chinese Nutrition Society and the School of Public Health, Lanzhou University, in cooperation experimental study whether the food grams, researchers from the nearest five or six published books, newspapers and magazines collected more than 500 grams of food information and classification We selected the most representative food experiment. Chinese Nutrition Society and the School of Public Health, Lanzhou University jointly recruit 100 volunteers, half men and women, aged 25 to 45 years old, and health checks. Selection of five pairs of so-called "phase grams of food" to eat together in the experiment, including pork and lily, sesame chicken and beef with potatoes, tomatoes and potatoes, leeks and spinach. After the volunteers ate a week observing their urine, feces, blood, spirit, body temperature and other reactions, the experimental results of all normal, did not find any group of food-borne gastrointestinal disorders, vomiting, poisoning and other phenomena [1], [3 ].
Chinese Nutrition Society of Changge can woo with Harbin Medical University, experts Lanzhou University, and on the "food phase" for the study, randomly selected 130 healthy volunteers for the folklore of the most widely "phase grams of food" - pork and lily, and sesame chicken, beef and potatoes, potatoes and tomatoes, leeks and spinach experiments were conducted. They follow the homely cooking method, the volunteers consumed observe their urine, feces, blood pressure, mental, reaction temperature, etc. These "phase grams of food" A week, everything is normal results [4].
Why folk "food phase", said widespread?
"Grams of food," the legend is so popular, combined with literature, I summarize the main reason for the following areas [1]:
(A) individual differences
Differences between individuals or people affected by the disease, resulting in different physical food to eat on the same exhibit different changes. In general, patients with gastric ulcer is not suitable for more food can promote the secretion of gastric acid foods, such as corn and patients with diabetes are not suitable polysaccharide if eaten, generally there will be discomfort. However, due to a lack of understanding of nutrition-related knowledge, people will blame "grams of food."
(B) the unclean food
Considerable evidence, reports of food poisoning caused by contaminated food is due cause, rather than "food phase" cause. Everyday life diet, the food in the collection, transportation, cleaning, cooking among production, contamination or the occurrence of toxic chemicals can cause food spoilage and other gastrointestinal adverse reactions, diarrhea, poisoning or even death.
(Iii) long-term large doses of nutritional supplements
If large doses of vitamin C supplements in the short term will produce more urine, diarrhea, skin rashes and other side long-term excessive use of vitamin C supplements, may lead to oxalic acid and uric acid stones. If large quantities of daily vitamin supplements C2000 mg to 3000 mg, suddenly stop taking it, pour may therefore lead to scurvy. Another example of long-term consumption of large amount of vitamin A can lead poisoning. The above situation also can not help and the "food phase" linked.
(Iv) a coincidence
In history at the time some things can not be the correct interpretation, for example, some people eat some of the bacteria, virus contamination of food caused by poisoning, and even lead to death, happened before symptoms appear two kinds of food to eat a certain, thereby causing misunderstanding, which repeated the baseless assertion .
(E) very few people allergic constitution due to special
When the ancients did not understand the body-specific allergic reactions, it is explained by the "food phase" saying, ancient legend after this erroneous statement. For example, there will be a friend to eat pineapple severe abdominal pain, once accidentally eating old meat pineapple, actually wringing his pain and was rushed to hospital for emergency treatment. And this is not directly related to the nature of the food itself, but his metabolism caused by an allergic reaction, most people eat pork and pineapple without any discomfort.
References:
[1] Zhao Jinsheng and some food and animal food composition of the population again grams. Lanzhou University Thesis, 2010
[2] Zheng Ji. The so-called "food phase g" of the experiment. Journal of Nutrition, 2009.
[3] Zhang Yin Hong, Deng Lili, Wang, Zhao Jinsheng, Yue Li, Ge Yu. Survey and experimental observation concerning "food phase" in. Journal of Nutrition, 2011.
[4] experiment overthrow grams of food, said 130 people in person, "try to eat" unharmed
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