Benefits of sunbathing:
1. Cancer prevention
Lack of vitamin D in the human body will increase the risk of cancer. . Sunbathing It can promote the synthesis of vitamin D. Students from the University of California, San Diego studied and compared the incidence of colon cancer in New Mexico and New York and found that the incidence of colon cancer in the latter was three. times that of the first. The reason is that daylight hours in New York are much shorter than in New Mexico, which significantly reduces opportunities for basking in the sun.
2. Helps supplement calcium
Baking in the sun can help the body obtain vitamin D, and vitamin D can promote the body's absorption and use of calcium and reduce cramps in the legs caused by calcium deficiency. For infants and young children, it can effectively prevente rickets and rickets. For middle-aged and elderly people, it can effectively prevent and treat osteoporosis and rheumatoid arthritis.
3. Reduce infection
Proper exposure to ultraviolet rays can effectively kill bacteria on the skin surface and improve skin resistance, thereby reducing the risk of skin infection.
4. Prevent anemia
The sun's ultraviolet rays can stimulate bone marrow cells to produce red blood cells, improve hematopoietic function, and effectively prevent anemia.
Disadvantages of sunbathing:
The disadvantages of sunbathing are that excessive sunbathing can cause dermatitis, melanin pigmentation , burns and even skin cancer.
1. Solar dermatitis
Solar dermatitis, also known as polymorphic sun rash, is a skin disease that occursnsible to ordinary light in young and middle-aged women. It is more common in spring. and summer and this often happens repeatedly. You should try to avoid the sun's rays, and when going outside, be sure to block light or apply light-blocking agents such as tincture or emulsion of para-aminobenzoic acid 5% to 10%, a 5% dioxide peptide cream, etc. A small amount of long-wave and/or medium-wave ultraviolet irradiation can be tried before the attack season, and the amount of exposure can be gradually expanded to improve the skin's tolerance to ultraviolet rays.
2. Pigmentation
There are a lot of ultraviolet rays in the sun. When ultraviolet rays (B wave, A wave) are irradiated on the skin (the B wave, UVB, acts on the basal layer of the skin, while the A wave is more powerful, acting on the dermal layer of the skin), the skin will be in éstate of self-protection. Stimulates melanin pigment and activates tyrosinase activity to protect our skin cells.
Tyrosinase reacts with tyrosine in the blood to produce a substance called “dopa”. Dopa is actually the precursor of melanin. It is oxidized by tyrosine and releases melanin, which will form freckles, sun spots, brown spots, etc. on the epidermis of the skin.
3. Skin burns
Prolonged exposure to the sun will burn your skin and hurt your eyes. The Huffington Post in the United States recently pointed out that short-term exposure to ultraviolet rays can burn the eyeballs, while long-term exposure to ultraviolet rays can cause eyelid cancer, cataracts and degeneration of the eyes. the macula. Dr. Karl May, American ophthalmologist, reminds us that we must pay attention to sun protection of the eyes even in winter.
①Buy a good pair of sunglasses with framed sidesSunglasses with frames that fit your face provide complete protection against UV rays.
② Wear a wide-brimmed hat when you go out. The hat can block half of ultraviolet rays. Wide-brimmed, dark-colored hats provide better protection.
③The sun's ultraviolet rays are strongest between 11 a.m. and 2 p.m., so it is best to avoid traveling during this time.
4. Skin Cancer
American scientists have published a research report which once again confirms that the greater the exposure to the sun, the higher the risk of skin cancer. This study is the first to show that a person's cumulative sun exposure over their lifetime is directly linked to the likelihood of developing melanoma. Melanoma is one of the forms of cancer of themost serious skin. For every 10% increase in average annual sun exposure, the risk of melanoma increases by 19% for men and 16% for women.
How to be healthier in the sun
1. Wear ** or green sunglasses
The most appropriate sunglasses to wear in the sun are ** or green. lentils. Sunglasses with lenses** can filter 100% of ultraviolet A waves and allow infrared rays and 83% of visible light to penetrate the lenses. Sunglasses with green lenses can filter out 99% of UVA waves, and green is also a natural calming agent, which can cool you down in hot weather. It is recommended not to choose pink sunglasses when basking in the sun. Pink lenses can only filter 95% of UVA waves and some visible light with shorter wavelengths. They are only suitable forcloudy and rainy weather when ultraviolet. the rays are not very strong.
2. Wear red clothes
Natural therapy experts from the University of Sydney in Australia have discovered that red can emit a magical long wave of radiation, which can quickly "eat up" the potential of UV rays Short-wave rays, which cause potential damage to the skin, allow healthy medium- and long-wave UV rays to penetrate the body.
3. Carry light salt water with you.
Sunlight will increase your body temperature and water will be excreted from the body as sweat. When you expose yourself to the sun, it is difficult to realize that you are slightly “dehydrated”, except that your mouth is dry. It is recommended to carry a small bottle of lightly salted mineral water with you when basking in the sun. The rich minerals and trace elements contained in mined waterrale, combined with the action of sodium salt, can effectively balance electrolyte levels. the body and prevents you from losing too much water.
Is the sun good or bad for humans? What are the advantages and disadvantages?
1. Benefits of the sun for humans:
1. Improve the body's resistance
Traditional Chinese medicine believes that basking in the sun can warm the Yang Qi of the human body, and the Yang Qi can support the normal functions of the organs of the human body. If Yang Qi is sufficient, the human body will also increase its ability to resist disease.
2. Sterilization
For pathogens of various respiratory infectious diseases such as influenza virus and meningococci, the sun's ultraviolet rays are the natural enemy, and some bacteria will even be killed within a few hours. .
3. Prevent diseases such as ricketse, osteoporosis and rheumatoid arthritis
Exposing to the sun can help the body absorb calcium, Trace elements such as phosphorus can not only prevent the onset of rickets and rickets , but also effectively prevent diseases such as osteoporosis and rheumatoid arthritis. Children who spend more time in the sun may also strengthen their bones.
4. Preventing myopia
Life Times once reported a study from the Australian National University, which believed that lack of exposure to sunlight may be one of the causes of myopia. This is because sunlight stimulates the production of dopamine, which helps prevent distortion of the axial length of the eye when light entering the eye is focused. Therefore, spending more time in the sun and doing more outdoor activities can help nerds reduce the risk of myopia.
5. Increase vita levelsmine D
According to Life Times, sunlight can help the body produce vitamin D, an important nutrient needed for bones and the brain. Some vitamin D comes from exposure. in the sun, and a small amount comes from food. It can be said that vitamin D deficiency is closely linked to lack of exposure to sunlight.
2. Harmful effects of sun on humans:
Ultraviolet rays are strong in summer if you stay in the sun for 15 minutes your skin will feel burning. A short-term sunburn will cause redness, swelling and pain of the skin. If you are exposed to the sun for a long time without any protection, the skin will suffer from severe pain and peeling after sunburn.
People's Health Network - Sunbathing in the sun can keep you healthy, but too much sun exposure can harm your health
People'sHealth Network - Take stock of the health benefits of tanning
People's Health Network - Take stock of the health benefits of tanning
< p>Benefits 1. Solar energy will not pollute the environment by producing waste gases during combustion like coal and oil. Plus, it won't run out one day. have the dangers and after-effects caused by nuclear energy production. Therefore, if solar energy is used to replace existing coal, oil, natural gas and other energy sources, environmental pollution problems can be significantly reduced.Solar energy a. two major advantages: 1. The reserves can be considered unused (around five billion years). 2. They will not produce waste gas to pollute the environment, so this is becoming more and more important, for example, for some companies. develare currently opting for solar-powered cars, hoping to replace existing cars. Solar calculators and solar watches have been around for a long time. And some companies have successfully developed solar water heaters. These water heaters can not only save electricity and gas. also saves water. The advantages are numerous.
2. Bright sunlight on our skin will dilate subcutaneous blood vessels, increase blood flow, increase excretion and resistance of toxic substances, increase saliva and gastric secretion. juice, strengthens gastrointestinal motility and promotes appetite and digestion.
< p> 3. The skin can also produce vitamin D from certain chemicals, such as ergot and cholesterol, under sun exposure. are important components of our bones. Without them, you will suffer from rickets.4. The soleit is even more important for children, because they grow and develop quickly and bone development plays an important role. supporting the whole body. Once there is a lack of sunlight,If the body only allows it to form vitamin D, the child's development will definitely have serious problems.
5. In winter, pregnant women have many benefits from spending time in the sun. During pregnancy, the body's various metabolisms accelerate. The demand for various nutrients has also increased, especially the demand for calcium has increased significantly. As we all know, vitamin D can promote the body's absorption of calcium if pregnant women lack vitamin D in their diet. or have insufficient dietary intake and do not often receive sunlight, 17-dehydrocholesterol in the skin cannot produce vitamin D due to irradiationultraviolet and the absorption of calcium by the intestinal wall will be blocked in the event of long-term deficiency. of vitamin D, calcium, phosphorus and other substances, pregnant women are prone to a kind of softening of the bones. This disease is caused by the lack of nutrients due to the body's high metabolism.
6. For miners who have been working underground for a long time, sunbathing can help them recover and recuperate. To stay healthy, sunbathing has become a fashion
7. Energy. on earth depends directly or indirectly on the supply of sunlight. Green plants can convert solar energy into chemical energy, and plants can be eaten by animals. Animals are eaten by carnivorous animals, therefore depending on nutritional relationships, various organisms. in the environment are linked to form a food chain.
8. Ultraviolet rays fromsun have strong sterilizing abilities, and generally bacteria. Some viruses will be killed if exposed to sunlight for half an hour or more. hours
9. Bring light. Disadvantages: Increased ultraviolet UV-B rays from the sun have serious harmful effects on human health. Potential risks include the development and worsening of eye problems.