Regardless of the season, the first thing to check is that the sun can provide calcium, because the ultraviolet rays of the sun can promote the production of vitamin D3 before 7-dehydrocholesterol in the skin, then the convert. in vitamin D3 depending on skin temperature, transported and absorbed into the blood by lymph, etc., then active vitamin D is produced through the action of hydroxylase in the liver and kidneys. Vitamin D facilitates the absorption of calcium. At least half an hour in the sun each day will do the trick.
Exposure to sunlight can help the body obtain vitamin D. Vitamin D can help the body absorb and absorb calcium and phosphorus, making children's bones strong and strong . Can be used to preventricketsand rickets in children. In adults, it can prevent osteoporosis and rheumatoid arthritis.
Next, let's talk about whether basking in the sun through a glass will help supplement calcium?
People often see some parents keeping their children inside and “baking in the sun” through the glass. In fact, it is not recommended.
A pediatrician from Beijing Friendship Hospital said that rickets, also called "rickets", is caused by malnutrition and lack of vitamin D, calcium, phosphorus and other substances. Children who do not get enough food and sunlight are susceptible to this disease. However, vitamin D in children is mainly produced when ultraviolet rays irradiate the skin, with the exception of foods (such as egg yolks, potatoes, soy flour, carrots, liver). animals, fresh vegetables and fruits, etc.). ). The 7-dehydrocholesterol contained in human skin cannot be transformed intoanti-rickets substance, vitamin D3, only by ultraviolet irradiation. Therefore, regular exposure to the sun is a good way to prevent rickets.
Since glass, clothing, dust, smoke, etc. block the passage of ultraviolet rays,the skin should be in direct contact with the sun as much as possible. possible instead of "baking in the sun" through the glass.
Be careful! Sunbathing in the sun to supplement calcium requires exposing the skin. Is it ineffective to sunbathe through a window to supplement calcium?
No.
The sun's ultraviolet rays are divided into ultraviolet A, ultraviolet B and ultraviolet C. Ultraviolet C is almost absorbed by the ozone layer and has little effect on us. has strong penetrating power and can penetrate most transparent glass and plastics.
The ultraviolets B are mainly absorbed by the ozone layer and less than 2% reaches the Earth's surface. Its penetrating power is not strong and will be absorbed by transparent glass. However, ultraviolet B can promote mineral metabolism and vitamin D formation in the body, so basking in the sun through glass will not promote calcium absorption.
The best place to bask in the sun is outside. Even if you need to bask in the sun indoors for various reasons, you should open the windows and let the sun come directly into contact with your skin. “Shorts and short sleeves in summer, showing your face and hands in winter” is the best choice. In addition, sunglasses can be To avoid eye damage caused by direct sunlight, the cap can also prevent hair from getting sunburned.
Damage caused by lightThe rays of the sun on human skin mainly come from ultraviolet A and ultraviolet b. Ultraviolet A is a long wave that acts on the deeper layers of the skin and acts slowly, but can cause spot blackening. .
b belongs to the medium wave, acts on the surface of the skin and has rapid effects. It can stimulate skin keratinocytes, relax blood vessels and increase blood flow. It will turn red at first, then gradually turn brown. Prolonged exposure can even cause skin cancer.
What are the benefits of tanning through a window?
Yes, tanning through a window is an ineffective calcium supplement. Many people have heard that if we do it. If we want to replenish calcium, sunbathing is a very good choice and we need to expose our skin. But some people feel that the process of loungingr in the sun is particularly harsh and a bit unbearable, so some people have found a way to do it through glass. Is such an approach feasible? Obviously, this is not possible, because sunbathing can replenish calcium through the sun's ultraviolet rays.
1: Ultraviolet rays are rich in vitamin D
For humans, Vitamin D It is a very important substance that can promote the absorption of calcium in our body and then help us achieve the effect of calcium supplementation. So if we want to supplement calcium, the most important thing is to supplement vitamin D. There are many ways to do this, such as dietary supplements, drug supplements or sunbathing, which can help us supplement some amount of vitamin D.
Two: Glass refracts raysns ultraviolet
The reason we can't bask in the sun through glass is that glass refracts ultraviolet rays back, so We naturally have no way to absorb vitamin D from ultraviolet rays. Since there is no way to properly absorb vitamin D, it is naturally impossible to achieve the effect of calcium supplementation. This is why we say that if it is separated. by the glass If you're lounging in the sun, this is an ineffective calcium supplement, which is basically useless.
Three: Calcium supplement cannot be supplemented by sunbathing alone
In fact, you want to supplement it by sunbathing alone, this is also an unrealistic thing. We need to eat more calcium tablets to supplement some of the nutrients our body needs. In addition to calcium tablets, nWe can also eat more foods with a higher calcium content. If you don't know which foods have a higher calcium content, you can check it on the Internet. Then we should pay more attention to our health, go to bed early and get up early, and exercise more when we have time. Exercise will improve our physical fitness.
But basking in the sun through glass has no calcium supplementation effect. Glass can absorb ultraviolet rays, so basking in the sun through glass does not en actually no effect.
How to bask in the sun correctly
1. When basking in the sun, the effect will not be achieved through the glass. outside to expose the skin. When you are in the sun, the right approach is to let your skin be in direct contact with the sun. At the same time, you should pay attention to protecting your eyes when reading or using a mobile phone under strong light. .
2. Avoid eating certain photosensitive foods before going out in the sun, such as green vegetables, celery, spinach, Chinese cabbage, etc. In addition, some traditional Chinese medicines, such as Angelica dahurica, also contain photosensitive foods. Food Substances: After being exposed to the sun, you should replenish water, eat more fruits, and supplement vitamin C to prevent the formation of melanin.
3. When you bask in the sun, youYou should lounge on your back, hands, feet and legs more often. Sunbathing on your hands, feet, and legs can increase calcium absorption and strengthen your bones. your back can help ward off the cold.
4. You can spend 15 minutes in the sun every day, not too long. When ultraviolet rays are strong, stay as little as possible to avoid damaging your skin.