Vegetable arguably prevent cancer it?

Lead: all kinds of anti-cancer health posts is the main force, “vegetable anti-cancer” is popular among some “popular science articles” also details the anticancer mechanism of various vegetables, colorful terminology, hype, help people I do not believe. Vegetables really that magical?

Eat more vegetables really good for preventing cancer

Vegetables are rich in vitamins, minerals, fiber and a variety of biologically active plant factor, really useful for anti-cancer eat more vegetables. The American Cancer Society had in 2012 published “Cancer survivors nutrition and exercise guidelines”, pointed out: “eat more nutrient-rich fruits and vegetables, or is likely to prevent certain types of cancer, reduce the relapse rate and improves survival benefit . ” But he said: “It is not clear exactly which components of fruits and vegetables in the most protective for cancer patients,” there is no clear evidence that there is a particular kind of vegetables can prevent cancer.

Therefore, the “Guide” is not to recommend one or a few vegetables, but recommends that people consume a wide variety of colored vegetables and fruit every day. For cancer patients, “Guide” also encourages them to drink at least 2 to 3 cups of vegetable juice and 1.5 to 2 cups of fruit juice (not limited to species).

Purple cabbage salad

Purple cabbage salad

Vegetables are not tumor nemesis

Since there is no kind of vegetable is specific tumor nemesis, since the anticancer mechanism of vegetables is not clear, so many widespread, with certainty how the message is going on?

To give an example, there is a message that says: “The glucosinolate glucoside compound broccoli, cauliflower and other cruciferous vegetables contain, can induce the body to generate a detoxification enzyme having regular consumption can prevent stomach cancer. , lung cancer, esophageal cancer incidence. ”

Seemingly scientific terms, clear mechanisms amazing result, but unfortunately, these are not withstand scrutiny.

By retrieving, we can learn the following knowledge: “glucosinolate glucoside” is the general term for sulfur compounds in cruciferous plants in a group, when the plant tissue and damage, can produce hot odors through a chemical reaction, so that the defense of fungi , insects and other violations, and its hydrolyzate “isothiocyanate salt” was found to reduce the carcinogenic intermediates, inhibiting tumor formation.

Broccoli salad

Broccoli salad

The problem seems solved, is not that the “cauliflower anticancer” scientific proof?

The so-called “put aside talk medicinal dose bullying,” research shows that to achieve the anti-cancer activity in the body, “isothiocyanate salt” intake should be at least 200-400mg, which is equivalent to eating too much cauliflower ?

The answer is: how much to eat enough. According to calculations, per 100g cauliflower contains “glucosinolates glucosidase” about 11.7-78.6mg, the average loss by 36% after cooking, and we need anti-cancer compounds, “isothiocyanate salt” After cooking content is almost zero.

In fact, evidence on the “isothiocyanate salts” as well as anti-cancer effect of cruciferous vegetables substantially from cell and animal studies, and in these experiments, the compound dose used far beyond these substances in people’s normal diet levels several orders of magnitude. Therefore, the results in the lab, “isothiocyanate salt anticancer” point of view and not directly translate to “eat cauliflower anticancer” conclusion. Moreover, with regard to anti-cancer effect of this compound itself is still controversial.

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Crab cooking flower

I heard “Foolish Old Man” story. Old man rapping rate descendants Ken Stone soil, intends leveled Taihang wangwu two mountains, and said: “Infinite deficient children and grandchildren also, but the mountain does not improve, why not flat?” This sounds good reason, to be specific the practice does not have the maneuverability, if not immortal apparitions, the result would be the “old and weak that he can not destroy one of beech.”

Also, eat a few mouthfuls of cauliflower, a very small amount of the intake point, in theory allowed to anticancer good substance, the tumor is, also, “he can not destroy one cancer hair.”

On the “anti-cancer vegetables”, we can summarize: daily intake of vegetables rich category does have anti-cancer benefits of its mechanism is not clear, there is no kind of vegetables are clearly proven to prevent certain tumors. In short, to encourage people to eat more vegetables, so that science, not rumor to lead our table.

 

Purple cabbage salad

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