Science makes life better

A 2019 study by researchers at the Harvard School of Public Health, Huazhong University of Science and Technology, and the University of Calgary in Canada found that “drinking a glass of sugary beverages every day” can cause health problems, including an increased risk of premature death among adults.

It is reported that a can of ordinary Coca-Cola or Pepsi contains about 40 grams of sugar, but the World Health Organization recommends only 25 grams of sugar per person per day. In order to meet the needs of health and change the “unhealthy” impression, Coca-Cola and Pepsi have launched their own sugar-free Coke. For example, Coca-Cola tried to replace white granulated sugar with a low-calorie sweetener “aspartame” to launch sugar-free and calorie-free zero-degree Coke.

New trend of dietary fiber and low sugar into beverages

The dietary fiber intake of residents is generally insufficient and showing a downward trend, reaching less than 5% of the specific recommended value (25 g/day). In this regard, some nutrition scholars believe that the addition of a small amount of dietary fiber to beverages for long-term intake may improve the problem of insufficient fiber intake.

In fact, many companies with sensitive sense of smell in the market have started to develop beverages that focus on the concept of health. Among the newly emerged functional beverages, products with added dietary fiber are one of them. As research in life science progresses, people will become more and more aware of the state of the body, what food they need to ingest, and the impact of food on the body. For example, in the United States, Starbucks will label the caloric value of each cup, and some restaurants will clearly label the calorific value of each serving of food. In the coming decades, the digital trend of food is worth looking forward to.

What kind of radiation can cause cancer in life?

The vast majority of radiation does not actually harm the human body and need not be worried. It is a special type of radiation that is really at risk for cancer, called “ionizing radiation”. Microwave ovens, high voltage electricity, Wi-Fi… are all non-ionizing radiation. Non-ionizing radiation energy is not high, can not directly affect the cells and DNA, and theoretically will not cause cancer. In addition, scientists have done a lot of research, and the conclusions are very clear. Exposure to these radiations will not increase the probability of cancer.

So what kind of radiation is ionizing radiation, and can it actually cause cancer? The ionizing radiation easily encountered in real life includes the following categories:

①Ultraviolet rays in sunlight

Skin cancer is the most common type of tumor in Europe and America. In the United States alone, more than 3 million people are diagnosed with various types of skin cancer every year. The most important reason is that they have a bad cultural practice, that is sunbathing. Ultraviolet rays are ionizing radiation, and long-term exposure will significantly increase the risk of skin cancer. If you often go to the seaside or plateau with strong sunlight, you must pay attention to protection.

②Natural radioactive elements

There are many natural radioactive elements in nature, such as radium-226, thorium-232, radon, etc. They are widely found in stones, soil and air. If natural stones are used for home decoration, be sure to look at the test report. Radon is colorless, odorless, but radioactive, and is particularly easy to gather in a closed basement. It is the second leading cause of lung cancer in the United States, after smoking. Therefore, room ventilation is important. In China, houses are mostly high-rise, so there is relatively little radon enrichment, but remember to check if you live in a villa.

③Medical radiation

X-ray, CT, PET, radiotherapy, etc. will produce ionizing radiation. Of course, the amount of radiation every time is not high, so if you are sick, you need to check or treat the day, the use must be used, because the benefits outweigh the disadvantages. However, you must be cautious when performing physical examinations. Recently, some hungry organizations are promoting PET-CT for medical examinations. In fact, PET-CT is not only expensive, but also has a large dose of eye radiation, which is mainly used for diagnosis and monitoring of cancer patients. , Strongly not recommended. By the way, the principles of NMR and B-ultrasound are different, and neither belongs to ionizing radiation. All in all, we are surrounded by radiation, most of which are harmless non-ionizing radiation. As long as you understand and avoid truly risky ionizing radiation, such as good sunscreen, pay attention to indoor ventilation, and avoid excessive radioactive medical examinations, there is no need to worry about it, and don’t spend money. 5G networks are also non-ionizing radiation and will not cause cancer.

Is drinking alcohol in moderation often good for health?

Some people think that “drinking alcohol can keep in good health”, and even some people think “drinking alcohol is a thing that is helpful to health”, this is a complete “rumor”. Borrowing the research conclusion of the authoritative medical journal “The Lancet”: the most appropriate amount of drinking does not exist.

It can be seen from the previous data that drinking has a great impact on human health. First of all, the number of deaths due to various causes in the world is about 32 million each year, and the “drinking” incident directly leads to the death of 2.8 million people, which is the seventh largest “fatal and disabling factor”. Our country has such a large population that our country has become the country with the largest number of deaths due to drinking. About 700,000 people lose their lives each year due to drinking, and the number of male deaths accounts for three quarters of the total. Drinking a small amount of alcohol will have some benefits for the body in the experiment-some previous studies have indeed confirmed some conclusions, such as “a small amount of drinking can reduce the risk of coronary heart disease and female diabetes”: but this small is called Compared with the “bad effects of drinking on the body”, the benefits are really worth mentioning. No matter how much alcohol you drink, it will increase the risk of cardiovascular and cerebrovascular diseases such as high blood pressure (fatal), aortic aneurysm, heart failure; as long as you drink, the risk will exist: the more you drink, the greater the risk.

Eating crayfish, do you have many question marks?

①Can you eat shrimp head?

Many people ask if the shrimp head can be eaten? Some people say that shrimp heads should actually be analyzed in detail. Some parts can be eaten and some cannot.

The main internal organs of shrimp, such as the heart, gills, stomach, etc., will be in the head of the shrimp. Generally speaking, it is easy to accumulate more heavy metals, so it is not recommended to eat shrimp head. Here is a special mention of the “yellow” in the head of the shrimp. It is neither shrimp eggs nor shit, but the liver and pancreas of the crayfish, that is, the liver and pancreas, which are easily contaminated. It is best not to eat them.

②Should the shrimp line be removed?

The shrimp line is the digestive tract of shrimp. In theory, it is not really clean. There will be more or less excreta and undigested food residues, so it is usually recommended to remove it when handling shrimp. But still that sentence, if you can live up to the psychological threshold, cooked food without worries.

③ Are there any parasites in the crayfish?

Crayfish, scientific name: Procambarus clarkii. Origin: Southern United States and Northern Mexico, introduced to my country through Japan in the 1930s. Crayfish have a strong ability to survive and reproduce, even if they live in a polluted water environment, they can survive or even reproduce offspring. Natural shrimp bodies, especially shrimp heads, will definitely accumulate feces and parasites, and the problem of heavy metal enrichment is inevitable. However, the crayfish currently on the market are basically artificially cultivated, and the proportion of wild is very small.

According to the results of market sampling surveys in some provinces and cities in recent years, the majority of commercially available crayfish lead, mercury, arsenic and other heavy metals, agricultural and veterinary drug residues are within safety limits.

Does tooth extraction really make my face smaller?

Many friends will feel that their face has become smaller and more beautiful after doing orthodontics or tooth extraction. Over time, the “legend” that “extraction of teeth will make the face smaller” appears. Is this really true?

The dentist explained that orthodontics will give people the illusion of “small face”, which can be explained in two ways.

First, during the orthodontic process, the doctor will tell the patient not to eat hard, sticky food for the time being. Patients with orthotics have less chewing function than before. After some time, the chewing muscles on the face will cause some wasted atrophy, especially for people with developed masseter muscles. ‘S face became smaller.

Second, orthodontics can sculpt the oral cavity, especially in the lower third of the face, including the three-dimensional direction of the length, width and height of the teeth and jaws. Sculpting is modification and fine-tuning. Since the three-dimensional spatial structure of the human face is interrelated, when the position of the front and rear images is changed, the position of the left and right images will change accordingly. Therefore, the process of orthodontics is a process of overall facial coordination, which will make people feel more beautiful and their faces more symmetrical.

The doctor reminded that everyone must not blindly pursue tooth extraction and correction for simple face thinning, and scientific and rational beauty is the best.