What are the benefits of sunbathing?
1、
Lack of vitamin D in human body will increase the incidence of cancer, and sun exposure can promote the synthesis of vitamin D. Students from the University of California, San Diego, USA have studied and compared colon cancer in New Mexico and New York, and found that the incidence of colon cancer in the latter is three times that of the former. The reason is that the sunshine time in new york is much shorter than that in New Mexico, and the opportunities for people to bask in the sun are greatly reduced.
2. Help supplement calcium
Sunbathing can help people get vitamin D, which can promote the absorption and utilization of calcium and reduce leg cramps caused by calcium deficiency. Can effectively prevent cartilage and rickets in infants. But also can effectively prevent and treat osteoporosis and rheumatoid arthritis.
Step 3 reduce infection
Proper exposure to ultraviolet rays can effectively kill bacteria on the skin surface and enhance the skin's resistance, thus reducing the chances.
Step 4 prevent anemia
Ultraviolet rays in sunlight can make bone marrow cells produce red blood cells, improve hematopoietic function and effectively prevent anemia.
What are the disadvantages of sunbathing?
The disadvantage of sunbathing is that excessive dermatitis, melanosis, burns and even skin cancer may occur.
1, solar dermatitis
Solar dermatitis, also known as polymorphic solar eruption, is a common photosensitive skin disease in young and middle-aged women, which occurs in spring and summer and often recurs. Try to avoid strong sunlight, and pay attention to shading or applying sunscreen such as 5% ~ 10% p-aminobenzoic acid tincture or emulsion and 5% dipeptide cream when going out. Try a small amount of long-wave and/or medium-wave ultraviolet radiation before the onset season, and gradually extend the exposure to improve the skin's tolerance to ultraviolet rays.
2, pigmentation
There are many ultraviolet rays in the sun. When ultraviolet rays (B wave and A wave) irradiate the skin (B wave is UVB acting on the basal layer of the skin, while A wave is more severe, acting on the dermis of the skin), the skin will be in a state of self-protection, and the activity of tyrosinase will be activated by ultraviolet melanin to protect our skin cells.
Tyrosinase reacts with tyrosine in the blood to produce a substance called dopa. In fact, dopa is the predecessor of melanin, which is oxidized by tyrosine, releasing melanin, and freckles, sunburns and dark spots will form on the skin epidermis.
3, skin burns
Being in the sun for a long time will burn your skin and hurt your eyes. The Huffington Post recently pointed out that short-term exposure to ultraviolet rays will burn the eyeball, while long-term exposure to ultraviolet rays will lead to eyelid cancer, cataract and macular degeneration. Dr. Calme Yi, an American ophthalmologist, reminds us to pay attention to our eyes even in winter.
1 Buy a good pair of sunglasses. Sunglasses with the edge of the frame fitted to the face can protect against ultraviolet rays in all directions.
Wear a wide-brimmed hat when going out. The hat can resist half ultraviolet rays, and the dark wide-brimmed hat is more protective.
The ultraviolet rays of the sun are strongest between 3 1 1 and 14, so it is best to avoid traveling during this time.
4. Suffering from skin cancer
American scientists once again confirmed that the more sunlight, the greater the risk of skin cancer. This study shows for the first time that the accumulated sunshine intensity in a person's life is directly related to the possibility of melanoma formation. Melanoma is the most serious skin cancer. With the increase of annual average sunshine intensity, the probability of melanoma in men increased by 19% and that in women by 16%.
What are the advantages and disadvantages of sunbathing? The above is a summary of the health network for your reference.