wild vegetables are the most common in this season. Have you eaten them? In spring and summer, plants sprout and all kinds of plants reveal their new buds. It’s a good time to pick wild vegetables. Recently, it has been reported by the media that major parks have been & lt; An army of wild vegetables; Occupy, a large February orchid by & lt; Pinch & quot;, Dandelions were also uprooted. But is it true that the wild vegetables on the roadside are not picked? What are your misconceptions about wild vegetables? Now follow to understand it!
Wild is green vegetable?
the safety is closely related to the growing environment.
wild vegetables, also known as wild vegetables, usually refer to wild or semi wild plants that grow naturally in the wild without artificial cultivation and are used for vegetable consumption, such as roots, stems, leaves, flowers or fruits. It has a long edible history in China. According to incomplete statistics, there are 213 families, about 1800 kinds of wild vegetables in China, and about 200 kinds of common wild vegetables. The total distribution is more in the South than in the north, which is consistent with the richness of plant resources. According to the quality, wild vegetables can be divided into herbaceous plants, lianas and woody plants; According to the edible parts, it can be divided into stem vegetables, leaf vegetables, cauliflower, fruit vegetables, root vegetables and fungi.
when it comes to wild vegetables, many people think that they will not remain toxic and harmful chemicals without artificial fertilization and pesticide spraying, so wild vegetables are safer and greener. But Shangguan Fazhi, an engineer of the herbarium of Kunming Institute of Botany, Chinese Academy of Sciences, told Science and technology daily; Wild vegetables belong to different genera and species, and can not be generalized in terms of safety, edible and pharmacological properties& rdquo;
in fact, although most wild vegetables grow naturally, they are not green food. Green food not only requires good ecological environment of producing area, but also must be produced according to the green food standard of Ministry of agriculture and implement the whole process quality control. Only the safe and high-quality products with green food mark recognized by special agencies are the real green food.
in modern society, there are too many heavy metals and other toxic and harmful substances in water and soil in many places, which may be absorbed by wild vegetables and enriched in plants; Automobile exhaust and air pollutants will also deposit on the surface of wild vegetable leaves. Wild vegetables growing near roads and factories will greatly increase the risk of pollution. They look clean and fresh, but if eaten, they may cause potential harm to our health.
Can plantain, dandelion and other wild vegetables fight cancer?
the amount we eat does not have anticancer effect. Clinically, alkylating agents, antimetabolic drugs, hormones, immune agents and some plant anticancer drugs can indeed kill some tumor cells. These drugs can inhibit or kill the growth and reproduction of tumor cells. Among them, plant anticancer drugs can inhibit the action of mitosis or enzymes, thus preventing the synthesis of proteins necessary for cell regeneration. Plant anticancer drugs are often combined with other anticancer drugs for the treatment of a variety of cancers. The most famous plant anticancer drug is paclitaxel from Taxus, which is widely used in clinic.
, but including Taxus, plants contain very little natural anti-cancer ingredients. Among the well-known Houttuynia cordata, one is called “Houttuynia cordata”; Quercetin & quot; This is one of the main evidences that Houttuynia cordata Thunb has been misinterpreted by most people as anti-cancer and anti-cancer. In the same way as Taxus chinensis, the content of quercetin in Houttuynia cordata Thunb is also very low. In terms of the amount of food we can eat, it can’t reach the effective concentration and dose of anticancer drugs.
at present, there is no kind of wild vegetables that is scientifically recognized as anti-cancer plants or drugs, so the anti-cancer of wild vegetables is purely a pseudo scientific proposition.
Are wild vegetables more nutritious than vegetables?
excessive consumption may be harmful to health
in the early years, wild vegetables were synonymous with lack of clothing and eat less, and it was difficult to be elegant. However, in recent years, they have become & lt; Nutrition and health; The representative of. Some people think that wild vegetables, especially bitter ones, are more nutritious than ordinary vegetables.
wild vegetables and vegetables we often eat are a big category, different wild vegetables have their own nutritional advantages and characteristics, can not be generalized. Because the growing environment needs a longer growth cycle, wild vegetables usually have more flavor than domestic vegetables. Fiber, oxalic acid, and some alkaloids bring unique flavor to wild vegetables, but also affect the absorption of some nutrients, and even have slight toxicity.
there are many kinds of wild vegetables. Some wild vegetables belong to edible and medicinal plants, which contain some toxic substances. If they are not processed, they may cause harm to human body and even endanger life. Such as gray bar vegetables, amaranth, etc., contains a photosensitive substance, people eat too much, and after sunlight may cause allergic reactions.
some wild vegetables as medicinal plants, in addition to the known functions of natural active ingredients, their toxicological research and evaluation are often not perfect, a small amount of edible or can obtain good medicinal value, but as vegetables, excessive consumption may have the opposite effect on health.
wild vegetables have been only wild vegetables for thousands of years, but they have not been upgraded to ordinary vegetables or medicinal materials, indicating that they are not perfect. And its overall nutritional value is not much higher than that of artificially cultivated vegetables, so it is unnecessary to superstitiously believe in the nutritional value of wild vegetables.
How to eat it scientifically and safely?
wash, blanch, and eat the familiar variety
in moderation, even if the wild vegetable is not necessarily & quot; Green vegetables;, But there are still a lot of people who like it. So, what should we pay attention to in the process of picking wild vegetables?
suggested that when eating wild vegetables, we should choose plants with better growth environment and no pollution; At the same time, it should also be scientific picking, try not to dig roots, only collect the stems and leaves, but also pay attention not to excessive collection, which will affect the survival and reproduction of the species. In the selection of wild vegetable species, when there is no expert guidance, try to choose the plants that people generally eat and they are familiar with.
in addition, when cooking wild vegetables should pay attention to washing, it is best to blanch with hot water. Firstly, some natural toxins can be removed by soaking in hot water; secondly, oxalic acid in some wild vegetables can be removed by blanching; Eating wild vegetables should be moderate. If you are addicted to wild vegetables, it may increase the gastrointestinal burden due to excessive dietary fiber intake, leading to physical discomfort.