Anti-cancer and anti-cancer is the main force of all kinds of health posts at present, "vegetable anti-cancer" is one of the hottest, some "popular articles" also introduced in detail the anti-cancer mechanism of various vegetables, the term colorful, smallpox, can not believe. Are vegetables really so magical?
Eat more vegetables is indeed beneficial to cancer prevention and cancer
Vegetables are rich in vitamins, minerals, cellulose and a variety of bio-active phytochemicals, and eating more vegetables is indeed beneficial for cancer prevention and cancer prevention. The American Cancer Society issued the "Guide to Nutrition and Exercise for Cancer Survivors" in 2012 and pointed out that "eat more nutritious fruits and vegetables, or it may be beneficial to prevent certain types of cancer, reduce the recurrence rate, and improve survival. ". But at the same time it said: "It is not clear at the moment which ingredients in fruits and vegetables are most protective against cancer patients," and there is no clear evidence confirming which kind of vegetables can prevent the occurrence of specific tumors.
Therefore, the "Guide" does not recommend one or more kinds of vegetables for everyone, but suggests that people take in a variety of colored vegetables and fruits daily. For cancer patients, the Guide also encourages them to drink at least 2 to 3 cups of vegetable juice and 1.5 to 2 cups of fruit juice (unlimited) each day.
Vegetables are not tumor killers
Since there is no particular type of vegetable that is a specific tumor nemesis, since the anti-cancer mechanism of vegetables is currently unclear, what is going on in many widely circulated and eloquent posts?
As an example, there is a post that says: “Thioglobulin compounds contained in cruciferous vegetables such as broccoli and cauliflower can induce a detoxifying enzyme in the body. Regular consumption can prevent stomach cancer. , lung cancer, esophageal cancer."
The seemingly scientific terminology, the clear and clear mechanism, and the pleasing results, unfortunately, all of these cannot withstand scrutiny.
Through the search, we can easily understand the following knowledge: “Thioglucoside†is a generic term for a group of sulfur-containing compounds in cruciferous plants. When a plant tissue is damaged, it can produce a hot and spicy odor through chemical reactions, thus preventing fungi. Insults such as insects, etc., its hydrolysis product "isothiocyanate" was found to reduce carcinogenic intermediates and inhibit tumor formation.
The problem seems to be solved. Isn't this the scientific proof of "cacao cancer"?
The so-called "put aside the dose of drugs is to run rumors," related research shows that in order to achieve anti-cancer activity in the human body, "isothiocyanate" intake should reach at least 200-400mg, which is equivalent to eating a lot of cauliflower ?
The answer is: not enough to eat. According to calculations, about 11.7-78.6 mg of “threonine glucoside†is contained per 100 g of cauliflower, the average loss rate after cooking is 36%, and the anti-cancer ingredient “isothiocyanate†we require is after cooking. The content is almost zero.
In fact, the current evidence for the anti-cancer effects of “isothiocyanate†and cruciferous vegetables comes from cell and animal experiments. In these experiments, the doses of the compounds used far exceed the normal levels of these substances in people’s diets. The level of several orders of magnitude. Therefore, the concept of "isothiocyanate anticancer" obtained in the laboratory does not directly translate into the conclusion that "eat cauliflower and cancer". What's more, the anti-cancer effect of this compound is itself controversial.
Everyone has heard of the story of "Yugong moved mountains." Yu Gong led his descendants to throw stones at the soil, intending to level out the Taihang and Wangwushan mountains, and thought: “The children and grandchildren are also endless, and the mountains do not increase, why bother and injustice?†This truth sounds good, but can be specific In practice, it does not have operability. If it is not the immortal, the result must be "with the remaining capacity, it can not destroy one of the hair."
Similarly, eating a few mouthfuls of cauliflower, a tiny amount of substances that are theoretically approved to have anti-cancer benefits, is also a “could not destroy one of the cancersâ€.
With regard to “vegetable cancer,†we can conclude that daily intake of rich vegetables is beneficial to cancer prevention and cancer prevention. The mechanism is not yet clear. At present, no vegetable has been clearly proven to prevent specific tumors. In short, encourage everyone to eat more vegetables, let science instead of rumors to dominate our table.
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