This article experts: Liu Shaowei, East China University of Technology FDA Research Center, deputy director, Professor, Penn State University, Ph.D. in food science, Kansas State University postdoctoral

Recently, the Internet on a "These three kinds of vegetables" toxic ", do not eat! The article aroused the concern of many people, the article said bracken, red cauliflower, fold the ear root is toxic or even carcinogenic. So, these vegetables really as the article said? Today we will decrypt these "toxic" vegetables.

Bracken (Photo / Visual China)

Bracken

Bracken, also known as fist dishes, cat claws, leading vegetables, many families in early years will appear on the table a vegetable, but there are already relevant animal experiments show that bracken is carcinogenic, epidemiological studies in some areas It shows that the excessive intake of Bracken and upper gastrointestinal cancer have obvious correlation.

The carcinogenicity of Bracken is mainly due to the fact that fresh Bracken contains a substance called prodinium that is an intermediate metabolite that is formed during metabolism in the body and can cause damage to DNA molecules and induce cancer.

Can you eat bracken peacefully?

Most families eat dried bracken, dried bracken in the processing process will be blanched and repeatedly over the water process, and the original fern is volatile and has a water-soluble heat, so bracken in the original fern Glycoside content is low, little impact on the human body.

For fresh bracken, as long as the boil water before the fry, then follow-up cooking, you can also remove most of the original bracken bracken.

Protostellantin in the bracken bud part of the highest content. If you are worried about boiled water can not completely remove the original fern, you can cut off the tender part of the first cooking, you can remove most of the original fern.

It should be reminded that although it is possible to reduce the original fern in bracken by adjusting the cooking method, it can not be completely removed. Therefore, a small amount of brackish food will not cause damage to the human body, but must not eat for many years.

Hongfeng dishes

Hongfeng dish is also known as red back (shellfish), purple back (shellfish) dishes, Guanyin dishes, red back to Panax, purple back to Panax, because of its cooked red color, many people mistakenly believe that with blood Efficacy, it is also known as blood (snow) vegetables.

Hongfeng vegetables contain a class of substances called pyrrolizidine alkaloids (abbreviated PA), of which about 60 compounds, some of which have potential hepatotoxicity or have been shown by animal experiments to have certain Carcinogenicity. If long-term consumption of red cabbage, it is likely to damage the liver, severe liver cancer will be induced.

How to eat red cauliflower?

In principle, we do not recommend everyone to eat red cabbage. This is because although high temperatures can destroy part of the pyrrolizidine alkaloids, they can not be completely removed. If you must eat, be sure to select boiled water after the stir-fried cooking methods, while each consumption should not be too much.

In addition, many people mistakenly recognize amaranth as red broccoli. Here to remind everyone, although the cooking will be bright red, but amaranth pyrrolizidine alkaloids can be assured food.

Folding ears

Fold ear is also known as Houttuynia, is the most popular flavor of vegetables in southwest China, which contains a class of aristolina lactamases, is a carcinogen aristolochic acid metabolic intermediates.

When the body takes in aristolochic acid, it metabolises aristolactam, a substance that can cause DNA damage and trigger cancer. In the meantime, there is evidence that even the direct intake of aristolactam also has some nephrotoxicity and carcinogenicity.

Is it carcinogenic?

Aristololactam is divided into Ⅰ, Ⅱ two kinds, aristololactam-Ⅰ will cause damage to the liver and has a strong carcinogenicity, while the aristolochic lactam-Ⅱ is non-toxic.

Fold ear root contains Aristololactam - BII, AII and FII, that is, Ⅱ class aristolochic amide, so do not have carcinogenicity, you can rest assured that food.

Scientific diet, regular rest is the fundamental anti-cancer

For carcinogenic vegetables, we do not have to be too alarmed. Cancer is the result of a combination of factors. Although some vegetables contain carcinogenic components, their contents are generally not high. As long as they are properly cooked and their intake controlled, they have little effect on carcinogenesis.

In addition, not every kind of vegetables are suitable for long-term human consumption of large quantities to ensure that diet diversity, regular healthy rest is the basis for the prevention of cancer.

[Editor: Cao Fan Shu PQ027]