Can you drink lotus root soup when it turns black? Why is lotus root soup black

You can still eat it. The soup will turn black because it is rich in iron and tannins.

Chemical composition. Iron oxidizes when exposed to heat, and its color becomes darker. The phenols in the tannin produce a polymer of quinone to form brown pigment, and the soup color and lotus root will slowly darken, also known as tannin.

A chemical reaction took place.

In addition, another cause of discoloration of tannins is the formation of dark tannins with metals, which turn blue when exposed to iron.

However, if it turns black because it has been left for too long, it will definitely not be fresh, so don't eat it. The lotus root soup turns black if it is not because it has gone bad, it is drinkable. Of course, the taste will be much worse, and the nutrition will be discounted a lot.

It is best not to drink the lotus root soup when it turns black.

The taste will be much worse, and the nutrition will be discounted a lot.

1. The reason why the lotus root in the iron pot turns black is related to the polyphenolic chemicals contained in it, and these guys have a common property, that is, they can combine with iron ions to form a colored complex of purple or blue. One of the abundant polyphenols in lotus root——— gallic acid, when combined with iron ions, forms a blue-black substance, which is the main component of blue-black ink. It's no wonder that pork rib soup can be made into ink soup.

2. The polyphenols in the lotus root that are placed in the vegetable basket without any contact with iron are oxidized into chemicals called "quinones" under the action of polyphenol oxidase (PPO), and these quinones are then polymerized together to form melanin. In fact, the cut apples turn brown and the bananas that are kept in the fridge turn jet black, all due to this reason.

I can drink it. It should be the cause of oxidation.

Yes, black is the starch that has been oxidized.

1. Lotus root is rich in iron and tannin chemical components. Iron oxidizes when exposed to heat, and its color becomes darker. The phenols in the tannin produce a polymer of quinone to form brown pigment, and the soup color and lotus root will slowly darken, also known as tannin, and a chemical reaction occurs.

In addition, another cause of tannins discoloration is the formation of dark tannins with metals, and lotus root soup boiled in an iron pot is black.

2. Lotus root belongs to the subclass Magnolia, and the order of Mountain Longyan. Warm-loving, intolerant of shade, not suitable for lack of water, strong winds. The lotus root is slightly sweet and crisp, can be eaten raw or cooked, and the medicinal value is quite high, its roots, roots, leaves, flowers, whiskers and fruits, all are treasures, can be nourished into medicine.

Lotus root is made into powder, which can eliminate food and stop diarrhea, appetize and clear heat, nourish and nourish, prevent internal bleeding, and is a good liquid food and nourishing treasure for women, children, children, and the frail and sick.

From the reason why the lotus root turns black, the blackened lotus root can be eaten, but because it is eaten for too long, it will definitely not be fresh, so I don't want to eat it. If the lotus root soup turns black if it is not because of spoilage, then Xiangxun Lu can be drunk! But the taste will be much worse, and the nutrition will be discounted a lot.

Why is the lotus root soup black:

The lotus root will turn black after heating, and the appearance is ugly. This is because lotus root is rich in iron, which will oxidize when exposed to heat, and the color will turn darker. Therefore, it is better to use ceramic or stainless steel utensils for cooking, and avoid using iron pots, aluminum pots and iron knives to reduce oxidation and blackening.

There are two reasons why lotus root soup turns black during cooking. One is that you chose the wrong lotus root, and the second is that you used the wrong pot.

Lotus root soup is a soup dish with a light taste. No need for much seasoning. Only salt is required. Of course, if you add some wolfberries and chopped green onions to the lotus root soup, it is also very delicious.

Its preparation is also very simple, the lotus root is cleaned. Blanch the pork ribs, put them in a pressure cooker with the lotus root, and add salt. You can also put in an appropriate amount of red dates and wolfberries according to your taste.

It takes about 15 minutes to turn off the fire. Remove from the pan and sprinkle with chopped green onions. A delicious pork rib soup is ready.

First, the choice of lotus root.

It is best to choose powder root for stewed lotus root sugar. The flour lotus root is soft and glutinous. It tastes crispy and soft, slows down the pure flavor and easily neutralizes the soup. Pink lotus root is also a good choice, and the color of the crispy lotus root is generally white. So don't buy the white ones. <>

Second, the choice of pot.

It is best to use a pressure cooker to stew lotus root candy. Do not use an iron pot. The iron pot contains a lot of iron, which will oxidize the lotus root.

Also, the cleaned lotus root should not be exposed to the air for too long. Remember to blanch the lotus root in boiling water at 100 degrees for 70 seconds. This can make the oxidase enzyme in the lotus root ineffective.

Prevents the lotus root from turning black.

3. The efficacy of lotus root soup.

Lotus root meat is delicate, sweet taste, rich in protein, carbohydrates, fat, calcium, iron, phosphorus, vitamin C and vitamin B, nutrition is very rich, regular drinking lotus root soup can provide nutrition for the human body, strengthen the physique, enhance immunity. Lotus root also has medicinal value, lotus root soup has good benefits for the spleen and stomach, can nourish the stomach and nourish yin, benefit blood, stop diarrhea, and also has the effect of clearing heat and eliminating phlegm, nourishing blood and nourishing beauty. Lotus root soup is sweet and non-greasy, and it is a good therapeutic health food.

Fourth, it is well known that Hubei people love to eat lotus root. Hubei's pink lotus root is very famous. As a Hubei native, I also love lotus root soup. Especially the lotus root pork rib soup. Finally, I hope mine can help you out.