Can you still eat shredded potatoes when they change color, and what is the reason for the discolora

After the potatoes are cut, they are soaked in salted water, washed with water, and stored after preservation, so they will not change color. Potatoes are best cut fresh.

Material. 1 large potato, 2 millet peppers, chopped green onion, a little pepper oil, a little light soy sauce, salt, chicken essence.

Method. 1. Peel the potatoes, wash them and cut them into thin strips, and wash them with water. Wash the millet pepper and cut into rings.

2. Mix water in the pot and boil, then put the shredded potatoes in and cook for about 2 minutes (because the shreds can't be boiled for a long time, they will be soft after a long time, and the potatoes should be crispy), take out and soak them in cold boiled water, and put them on a plate.

3. Put the millet pepper, chopped green onion, Sichuan pepper oil, salt, chicken essence and a little light soy sauce on the shredded potatoes.

4. Pour oil into the pot, pour it on the shredded potatoes when the oil is hot for 7 percent, and then mix evenly with chopsticks.

Can you still eat shredded potatoes when they're black? How do you preserve shredded potatoes? Learn these tricks and don't worry about it again.

The shredded potatoes will oxidize when they meet the air and turn light black or red, which is fine to wash with water, but if it is sticky and smelly, don't eat it

If you don't let the shredded potatoes change color, you can soak the potatoes in cold water immediately after cutting them into shreds.

Yes, that's just normal discoloration as a result of tannin oxidation.

It is most likely because the time to blanch the shredded potatoes is too short, or it is also possible because the water has not yet boiled.

Potatoes contain a lot of carbohydrates, as well as proteins, minerals (phosphorus, calcium, etc.), vitamins, etc. It can be used as a staple food, as a vegetable, or as a supplementary food such as chips, potato chips, etc. Potatoes are currently the most important food crop in the world as a staple food for human beings, in addition to cereals.

The water that has been soaked in the potatoes of the locust group turns red, and then turns black-brown, which is actually a normal chemical reaction, the principle: the water soaked in raw potatoes contains starch and polyphenolase and other substances. After the polyphenolase produces the oxidation reaction, there is a chemical reaction called browning, which is not only found on potatoes, but also blackened after cutting the core orange of the apple.

In fact, it is mainly because it has become colder, and it may be oxidized with the air, so it will change color. And because it has become softer.

1. You can use cold water soaking to make the blanched shredded potatoes not change color, which can isolate the chemical transformation between the potatoes and the air and the possibility of changing the color of the potatoes.

Even the blanched shredded potatoes can be soaked directly in cold water, so that the fried shredded potatoes have a stronger taste. And the shredded potatoes can also be well preserved in the water, and the water becomes an insulator between the shredded potatoes and the air, so that the shredded potatoes will not undergo oxidation reactions, and the natural preservation time will be longer. However, this method is only suitable for two to 3 hours of storage, if the time is too long, it will lose the nutrients of the potatoes and affect the original taste of the potatoes.

Second, you can use the method of freezing to make the blanched shredded potatoes not change color, and this method is also directly used to freeze the air between the outside world and reduce the oxidation of potatoes.

There are some people in his life who will prepare the week's dishes on the weekend, and then take them out and stir-fry them when needed. For example, if he blanches the shredded potatoes on the weekend, and then he still wants to preserve the shredded potatoes, then he can save them in a crisper bag and freeze them in the freezer. This can last up to three to four days, and although it doesn't taste as good as fresh dishes, it still locks in nutrients.

People often soak sliced potatoes and shredded potatoes in cold or tap water to remove excess starch for cooking. But be careful not to soak it for too long and lose nutrients. If it's summer, just change the water in time.

When you stir-fry, it doesn't stick to the pan and tastes good. It's just that the nutrient loss is greater after soaking, and the longer the soaking time, the worse it is.

Another way is to cut it and brew it with cold water, then put it in a plastic bag, put it in the refrigerator and refrigerate it, and it will be no problem within three days. Or cover with plastic wrap and wrap the shredded potatoes in plastic wrap until they are stir-fried before opening, which will also prevent the shredded potatoes from oxidizing and turning black. It can also last for two or three days in the refrigerator.

The plastic wrap is light and thin, which can be well adhered to the surface of the shredded potatoes to avoid direct contact with the air, and at the same time, it can also ensure that the nutrients in the shredded potatoes are not lost.

Extended Materials. Potatoes have anti-aging properties. It is rich in B vitamins such as vitamins B1, B2, B6 and pantothenic acid, as well as a large amount of high-quality fiber, as well as trace elements, amino acids, proteins, fats and high-quality starch and other nutrients.

Potatoes are carbohydrates, but their content is only about 1 4 of the same weight of rice. Studies have shown that the starch in potatoes is a resistant starch that has the effect of shrinking fat cells.

Potatoes are very good high-potassium and low-sodium foods, which are very suitable for edematous obese people, and their rich potassium content is almost the highest among vegetables, so it also has the effect of slimming legs.

The fried shredded potatoes will turn black and discolored overnight, which is not recommended to eat, and it is easy to get food poisoning.

Stir-fried vegetables are generally ready to eat after overnight, and the same is true for potatoes. Potatoes generally appear black after overnight in the case of occurrence, if this is the case is not recommended to eat, it is easy to have food poisoning, potatoes are a very common food in life, the nutritional value is very high, not only to supplement the body's nutrition is very helpful, but also effective beauty. Many beauty lovers know that potatoes have the effect of removing dark bags under the eyes, cut the potatoes into small slices, put them under the eyes, and use them consistently every day to remove dark circles.

efficacy.

1. Water immersion method: For example, if the peeled potatoes and other easily discolored vegetables and fruits are soaked in cold water to isolate them from the oxygen in the air, they will not change color.

2. Phenol oxidase is the most active when the pH value is 6-7, and the activity will decrease when the pH value is less than 3. Therefore, adding acid vinegar to food to reduce the pH value can inhibit the activity of enzymes and slow down the rate of discoloration.

The reason for the discoloration is caused by oxidation, the potato contains a lot of enzymes, and it will react when it encounters oxygen in the air, thus changing color, so generally the cut potatoes need to be immersed in water to prevent discoloration.

There are three main conditions for the occurrence of browning: polyphenol substances, polyphenol oxidase, and oxygen. After the potatoes are peeled, they are exposed to the air, and the polyphenols in them react with oxygen to form o-quinones, which are further oxidized and polymerized to form brown pigments and melanin.

Whether the potatoes can still be eaten after they have changed color depends on the situation. If the potatoes are green, green, sprouted, or black or purple, they should not be eaten. If the peeled potatoes are purple, they can be washed off with water and can be eaten.

Potatoes that turn green, green, and sprout produce a toxin, known as solanine, which may cause nausea, vomiting, abdominal pain, diarrhea and other adverse symptoms after consumption, and in severe cases, it may also lead to food poisoning and other consequences. If you find that potatoes have a tendency to turn green, you need to discard them to avoid unnecessary physical injury. There is also a case where the potatoes are black and purple, and such potatoes may have gone bad and are not recommended to eat.

It may also cause symptoms of gastrointestinal discomfort such as abdominal pain and diarrhea after consumption. If the peeled potatoes are purple, they can be washed off with water, and it is possible that the potato starch is oxidized by oxygen, in which case you can eat them.

Potatoes are generally stored in the refrigerator away from light and fresh, and should not be placed indoors or in heated rooms. Potatoes do not like high temperatures, and too high a temperature can easily cause potatoes to spoil. For the sake of good health, it is recommended to buy and eat now, so as to ensure freshness.