FernAlso known as "head vegetable".It is said that Liu Bang's son Liu Gao ate ferns to stave off hunger, and ultimately died.After that, people in the Han Dynasty no longer ate ferns.So, are ferns poisonous?Scientific experiments have shown that ferns contain a carcinogen called "original fern glycoside," which can induce cancer.

Are ferns carcinogenic?

In the 1980s, Japanese scientists extracted a substance called "original fern glycoside" from ferns.Original fern glycoside has a clear carcinogenic effect. Eating it by cows will damage the bone marrow, eating it by sheep will cause blindness, and what effect will it have on humans?

Many countries have conducted experiments on the carcinogenicity of ferns, and have found that ferns can induce intestinal cancer, breast cancer, bladder cancer, and white blood cells in rats.Scientists have also conducted experiments on the carcinogenicity of cooked ferns, and even processed ferns can induce cancer.In the 1970s, a survey was conducted in the mid-mountain areas of Japan on the relationship between eating ferns and esophageal cancer.It was found that among the residents in those areas, men whose esophageal cancer rate increased by 2.1 times, and women increased by 3.7 times.Some studies show that ferns contain substances related to cancer, such as phenylacetic acid, fern amide, yellow alkanol compound, and similar substances to yellow alkanol.These substances have a clear carcinogenic effect, and original fern glycoside is present in all parts of the fern, with the highest content in the roots and stems of the fern, followed by the leaves. The content of original fern glycoside is even higher in the young parts of the fern!

It is best to avoid eating and process it properly.How to cook ferns?Only a few ferns are edible, such as pod ferns, horn ferns, and meat ferns.

Ferns can be eaten cold or hot.

Ferns can be eaten raw or dried, and can be made by boiling and drying after tearing.When eating, soak in warm water and cook various delicious dishes.The following is an introduction toPorkstir-fried ferns.Ingredients: 350g of ferns, 150g of pork,garlic chives

two bunches,chilitwo bunches, appropriate amount of oil,glutinous riceappropriate amount of wine, salt appropriate amount.Soy sauceappropriate amount.Method:1. After boiling the dried ferns in boiling water for 20 minutes, use the boiling water to soak for more than half a day, and you can tear it.

Wet ferns can be used directly.

Cut the pork into slices, and tear the ferns, chop the garlic chives and chili.2. Do not add oil to the pot, first fry the ferns until dry, add half a bowl of water and cook for a few minutes (this makes the ferns more flavorful), and cook the water.3. After frying the ferns, take it out, and start a new pot.

Heat the pot and add oil, and stir-fry the chili until fragrant.

Add the pork and stir-fry, add salt and glutinous rice wine, and stir-fry the pork until golden brown on both sides.4. Add the fried ferns and stir-fry, add a little water, soy sauce to marinate for two minutes, and stir-fry slightly to absorb the moisture.Ferns to be careful about eating

For most people, these scientific results are only found in academic journals, but for those who are passionate about wild vegetables, ferns are still a delicacy.

So, if you must eat ferns, what are the eating restrictions?

1. Generally, fresh ferns should be treated with wood ash or alkaline water.Such treatment can greatly reduce the content of original fern glycoside.

Such treatment only reduces, but does not eliminate, and there are no clear standards internationally regarding the toxicity and dosage limits of original fern glycoside.Therefore, we must be more cautious.2. People with cold and weak spleen and stomach should not eat it, and people with low blood pressure should also be cautious.Ordinary people should also not eat too much.

3. When eating ferns, remove the flower of the fern, wash it and rub it, and soak it in wood ash water for more than 3 hours before cooking.4. Ferns should not be eaten with

mung beans

together, mung beans are rich in vitamin B1, while ferns contain an enzyme that breaks down vitamin B1, so the two should not be eaten together.5. Because ferns are cold, so women should not eat ferns during their menstrual period.What are the nutritional value of ferns?

Although ferns contain carcinogenic substances, it does not affect people's love for it.

That's because it contains a lot of nutrients.

Let's take a look at the nutritional value of ferns!1. The tender leaves of ferns containcarrots

vegetables, vitamins,proteinquality, fat, sugar, coarse fiber, etc., containing 18 amino acids, and rich in nutrients.2. The cellulose in ferns can promote intestinal peristalsis, reduce the absorption of fat by the intestines and stomach, and has the effects of promoting urination, reducing constipation, and clearing the intestines.3. Ferns are sweet and cold, and have the effects of detangling, clearing heat, moisturizing intestines, and dispelling phlegm. Some effective components of ferns can dilate blood vessels, and frequent consumption can lower blood pressure and relieve headaches and insomnia.

4. Ferns can also stop diarrhea and promote urination. The dietary fiber contained in ferns can promote intestinal peristalsis, and can also treat rheumatism, dysentery, and cough.

5. Ferns have inhibitory effects on bacteria, which can be used for fever, intestinal heat and toxin, eczema, and sores. It has the effects of clearing heat, detoxifying, and killing germs.

What are the effects of ferns?

Ferns have the effects of treating high fever, muscle and joint pain, intestinal heat and toxin, difficulty in urination, female wetness and dysentery, constipation or habitual constipation.

1. Modern research shows that the cellulose in ferns can promote intestinal peristalsis, reduce the absorption of fat by the intestines and stomach, and has the effects of promoting urination, reducing constipation.

2. Ferns are sweet and cold, and have the effects of detangling, clearing heat, moisturizing intestines, and dispelling phlegm. Frequent consumption can lower blood pressure and relieve headaches and insomnia.

3. Ferns can also stop diarrhea and promote urination. The dietary fiber contained in ferns can promote intestinal peristalsis, and can also treat rheumatism, dysentery, and cough.

4. Ferns have inhibitory effects on bacteria, which can be used for fever, intestinal heat and toxin, eczema, and sores. It has the effects of clearing heat, detoxifying, and killing germs.

5. Ferns can be used to make

dumplings

, long rice, and fill the stomach, which can strengthen the spleen and replenish Qi, strengthen the body, and enhance immunity.Powdery skinPowdery millet can be used as food to relieve hunger, and it has the benefits of nourishing the spleen and strengthening the body, strengthening the body, and enhancing resistance to disease.