How do black beans distinguish between true and false?

How to identify true and false black beans

From time to time, there will be some news about distinguishing between true and false black beans. Everyone knew about black beans before. Only those dignitaries and farmers who don't know black beans will be laughed to death by others. Now there is always a phenomenon of fake black beans, so how to distinguish between true and false black beans? In fact, many people know the benefits of black beans, but they don't know how to identify them. They just think this kind of black beans looks better or the price is higher. I don't think it is fake. Some people never even thought that black beans would be fake. In fact, there are two ways to easily identify the authenticity of black beans.

There are two ways to identify the authenticity of black beans: the first is to look at the surface: authentic black beans, black beans have uneven particle size, large and small, and the colors are not all black, some are dark, and some are black with red; The dyed fake black beans are basically the same in size and basically black in color, as shown in the following figure:

You can observe carefully that the black beans on the left are not uniform in color. This is because the black beans are exposed to different degrees of sunlight during their growth, so the colors will be different, while the black beans on the right are dyed, so the colors are very uniform and basically the same, all of which are dark black; There are also subtle differences in particle size in the picture on the left, because black beans can't grow as big as usual during the growth process, and fake black beans naturally have to be processed into big and full beans to please consumers.

The second identification method: you can take a proper amount of black beans and put them in a container, pour a proper amount of white vinegar, and then stir. After stirring, the white vinegar turns red, which is true black beans. The white vinegar basically does not react, and the fake black beans do not change color. Sometimes, some consumers will encounter this situation when they go home to cook black beans. The reason for doing this is actually very simple. This is because black bean skin is called black because it contains anthocyanins, which will react with white vinegar, so we will see white vinegar turn red, while dyed black beans can't contain anthocyanins in their black bean skin, so naturally it won't change color. In addition, we can tell you that anthocyanins in black bean skin are a good source of antioxidants, which can scavenge free radicals in the body, especially in the acidic environment of the stomach, and have a good antioxidant effect, beauty and health care, and increase gastrointestinal peristalsis. However, it should be reminded that although black beans have so many effects on health, they are not suitable for raw food, especially for people with bad stomach.

Real black beans will also fade.

The owner of a grain and oil store told reporters that he has been distributing black beans for many years and has indeed seen dyed black beans, but some real black beans will also fade. So dyed black beans will fade, but it is not necessarily fake black beans that fade.

Online search found that there are indeed businesses that dye ordinary beans black as high-priced black beans, but the cost of dyeing beans is very high, because the dyeing is uneven, so few black beans are dyed. The discoloration of black beans also happens from time to time. If the black beans bought from the market only fade and have no peculiar smell, they are probably real.

There are also netizens who teach you how to distinguish black beans: first look at the appearance. There is a small white spot in the middle of real black beans. If it is dyed, the small white spots will of course change color; Second, look at the bean coat. If the inside is white, it is a real black bean. You can also rub the epidermis. Real black beans will not fade when rubbed hard on white paper, while dyed black beans will leave traces after rubbing. When shopping, citizens can rub black beans in their palms to see if they fade.

How to tell the true and false black beans?

There are three ways to identify black beans:

The first is to look at the appearance. There is a "small white spot" in the middle of the true black bean. The "small white spots" of dyed black beans will be dyed.

The second is to look at the bean coat. Real black beans are peeled and white inside. Because the bean skin is very thin, the color of dyed black beans will penetrate the endothelium. After peeling off the black clothes, you can see that the inside of the black clothes will also change color.

The third is to wipe the epidermis. Real black beans won't fade when rubbed hard on white paper. Dye the color of black beans, which will leave color on white paper after rubbing.

How to identify the quality of black beans?

There are several kinds of black beans.

Black beans can be divided into green bean black skin and soybean black skin.

When buying black beans, pay attention to peeling off the skin to see if the heart is green or yellow. If it is white, it is fake.

Green heart black beans are divided into big black beans and small black beans.

There is only one kind of small black beans.

Generally speaking, there are three kinds of black beans: big green black beans, small green black beans and small yellow black beans.

I don't know if I made myself clear.

How to distinguish true and false black beans?

1. Different shapes

Black beans are bigger than black kidney beans in shape. Black beans are mostly round, while black kidney beans are oblate.

Look at the appearance

There is a "small white spot" in the middle of the true black bean. The "small white spots" of dyed black beans will be dyed.

3. Wipe the epidermis to identify black beans

Soak black beans in water and rub them on white paper. Real black beans won't fade when rubbed hard on white paper. Dye the color of black beans, which will leave color on white paper after rubbing.

4. Open the bean to see the kernel: the bean kernel.

The kernels of black beans and black kidney beans are different. The kernel of black beans is generally yellow-green, while the kernel of black kidney beans is white. You can have a look when you go to buy beans.

5. The color of the soaked water is different. The difference between black beans and black kidney beans can also be seen by soaking. Black beans fade lightly, black kidney beans fade heavily, and black kidney beans are black water after soaking.

The difference between green heart and yellow heart black beans

There are two kinds of black beans: medicinal black beans are yellow hearts and edible black beans are green hearts.

The yellow heart was planted by our ancestors and has a long history. It's called male adzuki bean, which is mainly used as medicine.

Green heart is a new variety introduced, which is mainly used for eating.

How to distinguish true and false black beans

Soak black beans in water 15 minutes. Black bean water is light brown. Smell the black beans, there is no peculiar smell. Then peel the black beans. The reverse side of the black bean skin is dark brown, and the bean kernel is blue, indicating that it is a true black bean and a green kernel black bean. It can also be distinguished by weight. . .

How to tell whether black beans are true or false

First: look at the color. Because the skin of black beans contains melanin, it is normal for black beans to fade in the cleaning process, but the fading will not be too obvious. Moreover, after cleaning and soaking, most of the water will appear turbid color, and there will be no thick black due to cleaning or soaking.

Second: Look at the beans. After the true black beans are peeled, the kernel beans are mostly green or yellow, and the color of dyed black beans will penetrate the endothelium and make the beans black.

Third: sense of smell. If black beans are dyed, there will be some residual smell in the dye.

Fourth: Rub black beans with your fingers repeatedly, or slide back and forth on clean white paper. If there are black marks, they are mostly dyed with black beans.

To identify true and false black beans, many citizens have a misunderstanding that there are navel-shaped white spots in the middle of real black beans, and the white spots dyed by beans will be polluted. In fact, according to the different varieties of black beans, at this point, we can't just rely on color to distinguish between true and false.

How to identify true and false black beans?

This is what I saw in Baidu. I recommend you have a good look: there are several kinds of black beans, some are as round as soybeans, some are smaller, a little flat and a little kidney-shaped. In the past, it was only this flat and small one, and it only appeared round in recent years. It doesn't make much difference if you eat it, but when you use Chinese medicine, you choose a small kidney shape.

In addition, black beans are only from Ren Huang and Lvren (Bairen black beans are black kidney beans, so be careful when buying them). Taobao Shantou's black beans are good. They are all planted by farmers in the mountains themselves, and farmers can rest assured to eat.

1, the distinction between black beans and black kidney beans depends first on the bean kernel.

In fact, to identify whether black beans are disguised by black kidney beans through bean grains, just bite the beans inside and have a look.

The kernel of black beans is yellow when bitten, and now a kind of black beans is produced. After biting the black skin of the bean kernel, the bean kernel inside is green. After the black kidney bean bites open the black skin, the bean kernel inside is white with bluish black in the white.

So as long as you bite open the black beans, you will know whether you bought black beans or black kidney beans.

2. The difference between black beans and black kidney beans can also be seen by soaking.

Black beans are soaked in brown sugar water, and black kidney beans are soaked in black water. So in this way, you can easily tell whether you bought black beans or black kidney beans.

From the internet, it seems that a large number of green kernel black beans are planted in the northeast, and some people actually planted 500 acres! ! !

Black kidney bean, after searching online for a long time, also found out where this black kidney bean was planted. The place of origin is unknown, so you should be careful when buying black kidney beans.

Although the price of black kidney beans is cheap, it is not worth the loss when you get sick that day. After reading this, you should know how to identify true and false black beans, right?

How to distinguish black beans from "fake black beans"

So what's the difference between black beans and black kidney beans? Black beans have the reputation of being the king of beans. They are anti-aging and have good medicine and good food. Chinese medicine has always believed that black beans are the valley of the kidney and enter the kidney. Black beans can strengthen the spleen and promote diuresis, reduce swelling and promote qi; Nourishing kidney and yin, moistening lung and dryness, treating wind and heat, promoting blood circulation and detoxifying; Stop night sweats, blacken hair and prolong life. "Compendium of Materia Medica" records: "Beans have five colors, each of which treats five internal organs, but black beans are colder than water and can enter the kidney. Conditioning water, relieving flatulence, lowering qi, treating wind and heat, promoting blood circulation and detoxifying. " The nutritional value of black beans is higher than that of ordinary soybeans, because they contain higher calcium, iron, zinc, manganese, iodine and vitamins. Especially the active ingredient containing anthocyanins. Eating black beans regularly is beneficial to patients with hypertension and heart disease. Black bean, scientific name kidney bean, belongs to the genus Phaseolus, and its origin is mainly in the northeast. In contrast, the nutritional value of black kidney beans is low. Under the condition of medium fertility, the yield of black kidney beans is slightly higher than that of black beans, but the method of distinguishing black beans from black kidney beans is-1, and the hilum on the side of black beans is basically black and a little white; The hilum of black kidney bean is intact and the color is very white. 2. In terms of shape, black beans are mostly round with black and dull surface, while black kidney beans are oblate and oval with black and bright surface. 3, cut it, black beans are easier to cut, the flesh is yellow-green, and the protein fat and fat content of black beans are higher; Black kidney bean has a high starch content, and the texture is difficult to cut with a knife. After black kidney beans are cut, the flesh is white. 4. The difference between the two kinds of beans is more obvious. The skin of black beans is easy to wear off, revealing yellow-green pulp; The skin of black kidney bean is no longer black, but it is white inside. 5. Observe the water in which the beans are soaked. The light color is black beans, and the fading color is black kidney beans. 6. The process of beating soybean milk is also obviously different. Black kidney bean paste will turn black soon, and it will have a feeling of fine rice paste when poured out, and the foam will soon disappear. Another black bean soybean milk, slightly darker than soybean milk, has a strong bean flavor when poured into a cup, and the foam is lasting.

How to distinguish true and false black beans

Wash with water to see if the color fades. If you drop it, it's fake. It's not soaking, it's washing. If you really soak for a long time, the color will fade, but washing will not.

How to distinguish high-quality black beans?

Black beans are flat and sweet. It has the effects of invigorating spleen, diuresis and detoxification, and has obvious curative effects on edema, physical weakness, stroke, kidney deficiency and other diseases. Any food poisoning or drug poisoning can be detoxified by drinking black bean juice licorice soup.

On the one hand, whether black beans are full or not, on the other hand, the geographical environment, sunshine time and soil and water of black beans directly affect crops. This place in Bama, Guangxi has just these conditions. If it's black beans from Bama, Guangxi, it's still quite good. Bama has many brands to choose from, such as Bama Taipo and Shangpin Kangyuan.