The nutritional value of avocado is very high, but domestic avocado is imported. When many people eat avocado, they will find a problem. After the avocado is cut, it turns black inside. Why does avocado turn black? Is there any black fiber in avocado that can be eaten?
Why do avocados turn black
As shown in the picture, the interior of such avocado turns black because of the vascular oxidation and head rot caused by too long ripening time. In winter, the ripening time should not be too long. It should be placed at 25 ℃ in the sunshine for about 2 days. It can be eaten if it feels like a whole.
Causes of general fruit blackening
This is due to the broken skin of the injured fruit and the membrane acting as the 'protective wall' inside, which causes oxygen to enter into the fruit. Oxygen reacts with some compounds in fruits (usually embedded in them) and oxidizes them. Many compounds turn brownish black after being oxidized, so the injured part of the fruit turns black. Citric acid can be used to prevent the fruit from turning black. Because citric acid is very easy to be oxidized, it can be used to remove oxygen and prevent the fruit from turning black. That's why apple slices can stay dark for a long time after being dipped in lemon juice.
Avocado can be eaten with black thread
Some avocados will not become soft after ripening, which may be that they have been frozen after picking. Most of these fruits will not mature again, but there are fine black fibers in the pulp. This kind of fruit is edible. When eating, spit out the black aging fibers.
Some avocados will appear black aging fiber after being stored for a long time or ripened. This kind of fruit can also be eaten. However, when eating this kind of fruit, it needs to remove all the black fiber inside. The best way to eat this kind of fruit is to take out all the pulp of the fruit, put it in the juicer, add some milk, honey, etc., and then filter out the inside Residue, just drink juice.
Do you have any black fiber to eat
There is black line in the avocado after it is cut. When the avocado is over mature, there will be fibrosis black line in the pulp, or the storage time will be a little longer. There will also be aging black gluten in the avocado pulp, which can be eaten, but the taste will become poor, so it's better to spit it out when eating.
Fruit is a kind of fruit with high nutritional value, which contains many vitamins, rich fat and protein, high content of sodium, potassium, magnesium, calcium, etc. it can also be used as dishes and cans in addition to fruit; the kernel contains fat oil, which is non dry oil, with mild fragrance, for food, medicine and cosmetics industry. Avocado is light and fragrant. It can be eaten after peeling. The flesh is hard and has less water. It has a smell of butter.
Generally speaking, avocado is rotted internally due to over ripening. At this time, it's better not to eat it! When the fruit begins to rot, it will cause a large number of harmful bacteria to multiply and produce toxins. If people eat this rotten fruit, they may have dizziness, headache, nausea, vomiting, abdominal distention and other symptoms. In addition, the nitrate contained in the rotten fruit will turn into toxic nitrite, which may cause cancer if eaten for a long time.
The damaged part can not be eaten, because the toxin will continue to permeate and spread throughout the fruit, which is often larger than the rotten part seen. According to a U.S. medical organization, toxins can still be detected in the pulp 1 cm from the rotten part. Therefore, for the sake of safety, you should choose fresh fruit with bright skin color. If there is a slight spot or a small amount of moth eaten, use a knife to dig out the flesh part of the rotten moth eaten place and the place more than 2cm around it; if the mildew rotted or moth eaten area reaches or exceeds 1 / 3 of the fruit, it should be thrown away and cannot be eaten again.
Precautions for eating avocado
1. Avocado will have aged black fiber after being stored for a long time. This fiber cannot be eaten, but other pulp parts can be eaten.
2. Avocado contains a lot of fatty acids, so it is not suitable for a large number of consumption. Eating too much can cause obesity.
3. Avocado needs to be eaten as soon as possible after being cut. Avocado will be oxidized and blackened in the air after being cut. This blackened fruit cannot be eaten.