Ms. Shen is a health enthusiast and is open to all health information on weekdays. After learning that lettuce can fight cancer on the Internet, lettuce quickly became an essential ingredient for her family's three meals a day. Fried lettuce, boiled lettuce, fried lettuce and meat ... There are a lot of raw Caicai on Ms. Shen's desk. Only a week later, Ms. Shen's husband and children began to complain that this mighty "lettuce anti-cancer mobilization" could only end in failure.

Since ancient times, diet, diet and other cultures have had a great influence, and those ingredients with certain therapeutic effects have been warmly sought after by people. People talk about the anticancer effect of lettuce. There is no denying that there are anticancer substances in lettuce, but it is absolutely impossible to prevent cancer only through diet.

Many people know that lettuce contains a lot of nutrients beneficial to human body. Judging from its varieties, lettuce is a variety of lettuce in Compositae, which can form tender stems. It is an annual or biennial herb, which originated from the distant Mediterranean coast and then flowed into China.

The reason why lettuce can resist cancer comes from an anticancer substance-"aromatic hydroxylated ester", which has strong antioxidant capacity and can decompose carcinogen "nitrite". Because of this, many people think that lettuce can prevent cancer, and even think that lettuce can alleviate the symptoms of cancer patients. However, once we know the limited function of this substance, these veritable rumors are shattered.

The content of "aromatic hydroxylated fat" in lettuce determines that eating lettuce alone cannot achieve the ideal anti-cancer effect, so it is obviously unrealistic to eat more lettuce to prevent cancer.

Although lettuce may not help to fight cancer, it is undeniable that the nutritional elements in lettuce and its fresh and tender taste also determine its own edible value.

Rich in potassium and plant fiber, it can help people relax and diuretic. Potassium can promote the balance of water and electrolyte in the body. The existence of plant fiber can increase the frequency of gastrointestinal peristalsis and promote digestion and excretion.

In addition to promoting excretion, potassium and iodine can also soothe the nerves and relieve the symptoms of impatience and insomnia to some extent. Iodine is also one of the indispensable elements of human body, which can affect human development and metabolism, and even have a certain impact on mood and emotion.

Besides nutritional value, lettuce has some taboos. Eating a lot of lettuce may cause poisoning, including dizziness, lethargy and fatigue, and even damage the eyes, causing night blindness and seriously affecting daily life. Therefore, people suffering from urinary calculi, eye diseases, diarrhea and other diseases, it is best not to eat lettuce, so as to avoid more negative effects.

In life, more and more people regard diet cancer prevention as a method to prevent cancer, which is actually one-sided. Not only is the anti-cancer effect of lettuce exaggerated, but there are also many foods with anti-cancer labels, but their effects are extremely limited. If eaten improperly, they may even cause cancer.

Everyone must have heard of the anti-cancer effect of drinking tea. Tea contains anti-cancer substance-"polyphenols". However, it is useless to talk about medicinal properties without dosage. In many studies, it can also be proved that under almost the same conditions, there is not much difference in the probability of cancer between the group drinking tea and the group not drinking tea.

In addition, drinking tea may also cause cancer. For example, drinking hot tea will damage the esophagus and increase the risk of esophageal cancer and gastric cancer; Many tea drinkers also like alcohol and tobacco on weekdays. The combination of tea and tobacco and alcohol will not reduce the side effects of tobacco and alcohol on human body, but will increase the risk of esophageal cancer.

Secondly, the voice of yam in anti-cancer recipes remains high. Yam, as a medicinal material, has anticancer substances such as "polysaccharide", which can achieve the purpose of anticancer. But in fact, yam can only improve immunity and enhance physical fitness.

In addition, garlic, known as the "king of cancer", is an indispensable condiment in daily life. It can not only enhance the flavor of dishes, but also contain a lot of nutrients. It is found that the sulfide in garlic has certain resistance to cancer and tumor, and can promote DNA repair to some extent. However, in clinic, garlic has not shown enough effect in inhibiting cancer.

Broccoli, tea, yam, garlic and other foods are welcomed by many people because of the label of "anti-cancer", but once they are associated with specific clinical experiments, we will find that all the remarks about food anti-cancer exaggerate the role of nutrients in food itself. Therefore, all kinds of statements about "food anti-cancer" need to be viewed from a scientific perspective, and diet therapy cannot be regarded as a life-saving straw for treating cancer.

Undeniably, individual foods do contain certain anticancer substances, but it is difficult to achieve the dosage required for anticancer in dietary activities, and even under the action of various conditions in the human body, it may have adverse effects. Compared with diet, it is obviously more reliable to prevent cancer through healthy living habits.

First of all, staying away from alcohol and tobacco is an effective way to prevent cancer. Alcohol and tobacco are important causes of diseases in modern cancer-prone groups. The harm of tobacco and alcohol to human body may not be obvious in a short time, but it is easy to lay hidden dangers for various diseases. It was found that polycyclic aromatic hydrocarbons in tobacco and alcohol caused DNA canceration, which made Rb gene in the body lose its protective effect on cells.

Secondly, paying attention to a healthy diet is the way to prevent cancer. In daily life, eating leftovers that go bad at room temperature, eating a lot of fried food, and eating foods with excessive calories will all pose cancer risks to the human body. Therefore, it is very important to control food intake and eat more healthy food.

In addition, fitness exercise is also indispensable. Obesity is also an important cause of cancer in the high-risk group of cancer, which will increase the risk of breast cancer and uterine cancer in women. Exercise can help individuals consume fat, thus alleviating the pressure of obesity on organs and preventing cancer hidden dangers caused by obesity.

It is worth mentioning that the occurrence of cancer cannot be completely eliminated through various preventive measures in life. Adhering to healthy living habits can't completely keep people away from cancer, but unhealthy living habits will accelerate the occurrence of cancer.

Although there are still many unsolved mysteries about cancer, we can't give up on ourselves. A healthy life has always been dominated by reason.

The information age has brought convenient information channels, but we should also distinguish the received information with a scientific eye. Many foods containing anticancer substances can't play a good role in human body.

When you find a hidden danger of cancer, you should consult a doctor through formal channels, and you should not treat yourself because you believe the information on the Internet, so as not to delay the treatment.

References:

Zeng Hongmei, Chen Wanqing. Research status of tumor epidemiology and prevention in China [J]. Chemical progress, 2013,25 (09):1415.

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