Can soda water adjust the body's acid-base balance? Rumors on the June "Science Rumors List"

1. OK lenses can wear out the cornea

Rumor: The eyeball is soft, but OK lenses are hard. They will wear the eyeball and cause the cornea to become thinner, so they cannot be worn frequently.

The truth: Orthokeratology lenses, also known as orthokeratology lenses, are a non-surgical refractive correction method. There is basically no relative movement between the OK lens and the eyeball, and the material is also very safe. Correct use will not wear the cornea. It should be noted that not every myopic person is suitable for OK lenses, and they should be judged and fitted by doctors from professional institutions. The effect of orthokeratology lenses is reversible. If you stop wearing them for two weeks, the corneal shape will basically recover. In addition, the cleaning and care of OK lenses must be standardized to prevent lens contamination from causing keratitis.

Source: Toutiao refutes rumors

2. Soda water can adjust the body's acid-base balance

Rumor: Drinking more soda water is good for your health and can regulate the body's acid-base balance.

The truth: None of the claims that diet can regulate the body's acid-base balance is scientific. The internal environment of a healthy human body can automatically maintain an appropriate pH range, providing a stable environment for physiological activities in the body. For example, the pH value of the blood will remain constant at 7.35-7.45 and will not change due to drinking soda water. Drastic changes in the pH value of the blood are often due to major diseases, such as cancer. Therefore, the claim that drinking soda water changes the acid-base constitution is nonsense. Instead of worrying about eating acid or alkaline, it is better to pay attention to food diversification and make your nutritional intake more balanced and comprehensive.

Source: Science Refutes Rumors

3. If you have gout, you cannot eat tofu, meat or eggs.

Rumor: People with gout cannot eat tofu, meat or eggs, otherwise they will get sick.

The truth: This is a common misunderstanding. Most purines are lost during the production of soy products, so eating soy products does not increase the chance of gout attacks. Considering that blood uric acid may rise briefly after a meal, it is generally recommended to control the intake of soy products, and to follow the doctor's advice during the acute stage of gout. Compared with high-purine foods such as animal offal and crustacean seafood, meat and eggs do not have a great effect on blood uric acid. These foods are rich in essential nutrients for the human body, such as protein and fat-soluble vitamins. Long-term lack of intake will cause nutritional imbalance, which will reduce the ability to metabolize purine and increase blood uric acid.

Source: Toutiao refutes rumors

4. The longer you stretch after exercise, the better

Myth: Stretching after exercise helps relax your muscles, and the longer you stretch, the better.

The truth: Stretching for too long will not only not improve the effect, but also bring the risk of overstretching. Studies have shown that stretching for more than half an hour has no obvious benefits compared to stretching for 10 minutes. On the contrary, it will increase the risk of overstretching joints and ligaments due to excessive stretching time. Usually, after exercise, each stretching action should be done for 30 seconds to 60 seconds, 1-2 times, and the total stretching time for various actions should be about 10 minutes.

Source: Science Refutes Rumors

5. Oleander tea can enhance physical fitness

Rumor: Oleander is poisonous, but taking it can fight poison with poison and strengthen your body.

The truth: This is just a folk remedy. Although oleander has medicinal value, it should not be taken privately, because the wrong dosage or incorrect preparation method may lead to poisoning. For example, recently, a girl in Zhengzhou took a photo with oleander in her mouth. The flower juice was absorbed into the human body through the lip mucosa, causing poisoning. If you accidentally eat oleander, you must seek medical attention as soon as possible and seek help from a professional doctor. If you have young children or pets at home, you should not keep oleander to avoid poisoning.

Source: Toutiao refutes rumors

6. There are worms in bayberry, eating it is harmful to the body

Rumor: There are many short videos showing bugs crawling out of bayberries, proving that bayberries are dirty and eating them is harmful to the body.

The truth: The bugs in bayberries are fruit fly larvae, which feed on fruits and vegetables. They are not likely to carry germs and are safe to eat. It is difficult to avoid insects in bayberries, and there is no way to distinguish them. Friends who are concerned about this can soak the bayberries in salt water to drive out the fruit fly larvae, and then rinse them before eating.

Source: Tencent

About the Science Rumors List

Released by the China Association for Science and Technology, the list is reviewed by experts every month. Based on criteria such as timeliness and harmfulness, hot rumors are selected for special interpretation and pushed across the entire network.

Jointly published: Scientific rumor-busting platform, China Internet Joint Rumor-busting Platform, "Study to Strengthen the Country" learning platform

Platform support: Tencent Jiuzhen, Weibo Rumor Refutation, Toutiao Rumor Refutation, Douyin, Dad Review, NetEase Health

List of review experts (in order of the number of strokes of surnames)

Song Shuang, Associate Researcher, Institute of Nutrition and Health, Chinese Center for Disease Control and Prevention

Chen Peng, Vice Dean of the School of Journalism and Communication, Nankai University

Jia Changkai, deputy chief physician, Xiamen Eye Center, Xiamen University

Gu Lei, Associate Professor, School of Life Sciences, Capital Normal University

Tang Qin, Director and Researcher of the Science Popularization Department of the Chinese Medical Association

This article was published by the official account of "Science Rumor Refutation Platform" (ID: Science_Facts). Please indicate the source for reprinting.