Lettuce is a common home-cooked dish in the diet, and there are many ways to do it, such as cold lettuce shreds, fried lettuce slices and so on. Lettuce is not only a nutritious food, but also has medicinal effects.

Lettuce is rich in anticancer substances. Proper consumption can reduce the oxidation degree of the body and achieve anticancer effect.

This is a popular sentence on the Internet recently. For a time, lettuce became the best choice for cancer prevention. Is this statement reliable? Let's listen to the doctor.

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First, let's learn about the nutritional value of lettuce.

Lettuce is the treasure of the whole body, most of its nutritional value exists in the leaves of bamboo shoots, and it is rich in nutrients such as protein, carbohydrates, calcium, iron, phosphorus, magnesium, silicon, vitamins B, C and carotene.

Children eat more lettuce, which is very beneficial to growth and development. Eating 200 grams of lettuce leaves every day can meet the needs of carotene, and eating 500 grams of lettuce leaves can meet the needs of vitamin C.

Different nutrients have different functions:

Potassium: Lettuce is high in potassium, which is beneficial to diuresis and relieve heart pressure, and is extremely beneficial to patients with hypertension and heart disease.

Iodine: Lettuce contains a small amount of iodine, which has a great influence on people's basic metabolism, physical and mental development and even emotional regulation. Regular consumption helps to eliminate tension, help sleep and resist rheumatic diseases and gout.

Fluorine: Lettuce also contains fluorine, which is different from other vegetables. Fluorine can promote the growth and development of human bones, especially human teeth, and can participate in the formation of enamel and dentin, so fluoride can protect teeth.

Organic compounds: organic compounds contained in lettuce are rich in iron that can be absorbed by human body, which is very beneficial to patients with iron deficiency anemia. Iron contained in lettuce is easily absorbed by human body under the action of organic acids and enzymes.

Vitamin B: The vitamin B contained in lettuce has the effect of beauty beauty, which can make the skin white and tender, and is suitable for patients with rough skin.

Vitamin K: Vitamin K contained in lettuce can prevent the occurrence of osteoporosis and reduce the probability of fracture in the elderly.

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The study found that lettuce is a new "anti-cancer food"?

The doctor said: Strictly speaking, lettuce has no anti-cancer effect, and there are two main reasons:

The first reason: aromatic hydrocarbons cannot be fully absorbed by the human body.

Lettuce contains an aromatic hydrocarbon hydroxylated fat, which has a preventive effect on liver cancer and gastric cancer, and can also reduce the side effects of radiotherapy or chemotherapy for cancer patients. It is an anticancer vegetable.

It is true that the aromatic hydrocarbons contained in lettuce do have antioxidant effect, but the nutrient intake in the human environment and the food intake in the stomach are two different things.

Although lettuce contains aromatic antioxidants, these antioxidant molecules are difficult to be applied to the body environment, and naturally there is no way to play an effective anti-cancer role.

The second reason: antioxidants will not be completely absorbed.

Compared with other vegetables and fruits, lettuce has a high content of antioxidants, but for human needs, it is not enough to eat lettuce once or twice a day to achieve the ideal anti-cancer effect.

If you want to achieve the so-called anti-oxidation and anti-cancer effects by eating lettuce, you must eat at least dozens or even hundreds of lettuce every day, which is very difficult to achieve.

Whether lettuce can achieve anti-cancer effect is just a rumor without scientific basis. Although the claim that lettuce is anti-cancer has been overturned, the nutritional value of lettuce can not be ignored.

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Lettuce is good, but these three kinds of people are not suitable for eating.

1. Menstrual women should not eat cold lettuce.

Lettuce is cold, which may cause menstrual disorder and irregular menstruation for menstrual women and aggravate dysmenorrhea symptoms.

2, spleen and stomach deficiency or cold constitution should not eat more.

Lettuce is a cold vegetable, and those with deficiency of spleen and stomach need to dispel cold and tonify yang. Eating a lot of lettuce at this time will only make their spleen and stomach more burdened, which will lead to a series of consequences.

Therefore, before eating lettuce, be sure to know whether you belong to the category of spleen and stomach deficiency and cold. If this is the case, we should hold back our appetite, and don't be greedy and cause our body to catch cold.

People with eye diseases should not eat more.

Because lettuce contains a small amount of toxicity, after eating a lot of lettuce, people's own eyes will have problems, and the stimulation of some substances in lettuce will be counterproductive, leading to excessive stimulation of eye diseases and aggravating the condition.

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Lettuce should not be eaten with anything.

1, cheese

Cheese belongs to oily food, while lettuce is cold. Together, it is easy to cause indigestion, abdominal pain or abdominal pain and diarrhea.

At the same time, raw lettuce can not be thoroughly cleaned, and it is easy to be polluted by parasites, such as ditch worms and roundworms, which is not conducive to health.

2. honey

Honey is rich in wax, which has the function of relaxing bowels. But honey is cold, and lettuce is cold. Stomach and diarrhea can't be eaten together, so neither is suitable.

3. Lotus root

Like lettuce, it contains a lot of vitamins, protein and minerals. If you eat together, it will destroy your own nutrition, cause nutrient loss and affect the taste, so lettuce can't be eaten with these foods.

4. Herba Asari

Lettuce is not only a vegetable, but also has high medicinal value and can be used as Chinese medicine. Lettuce is cold and asarum is warm. If you eat together, it doesn't conform to the principle of yin and yang.

Secondly, asarum is also a traditional Chinese medicine. If he eats with lettuce, it will reduce his medicinal properties, and it will not play its due nature, and lettuce will not play its nutritional value.

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Healthy and Cold-proof Knowledge-Can the leaves of lettuce be eaten?

Sure, don't be silly. Throw it away.

Lettuce leaves are edible, and people always throw them away after eating them for a long time.

In fact, leaves are more nutritious than stems. The vitamin content in lettuce leaves is generally higher than that in stems, and the carotene content in leaves is ten times, the vitamin B 1 is twice, the vitamin b2 is five times and the vitamin C is three times.

The content of nicotinic acid in lettuce leaves is not only higher than that in stems, but also has better antioxidant effect. In addition, leaves also contain a lot of calcium. Every100g of lettuce stem contains 0.6g of crude fiber, 0.5mg of nicotinic acid, 23mg of calcium and 4mg of vitamin C.

However, every 1 00g of lettuce leaves contains1g of crude fiber, 34mg of calcium and13mg of vitamin C, so lettuce leaves are a very good alternative food.