1. Lack of sunlight for a long time will lead to vitamin D3 deficiency. Most of the sources of vitamin D3 in human body are synthesized through skin exposure to ultraviolet rays and intake of formula foods added with vitamin D3. If you can't see the sun for a day, you'd better take vitamin D of calcium.

2. Not seeing the sun for a long time is bad for your eyesight. Vision will be severely reduced, and there will be dry eye.

3. Not seeing the sun for a long time affects your mood. More prone to depression. Looking at the blue sky and white clouds, small bridges and flowing water, or overlooking the traffic and high-rise buildings in the world of flowers and flowers can make people feel relaxed and happy. And if we don't go out, we will accidentally lose social interaction-this is the biggest loss. We came to this world just to see the world.

First, sunbathing can delay aging.

Studies have shown that people with higher vitamin D levels are about 5 years younger than those with lower vitamin D levels.

Second, sunbathing can prevent rickets, rickets, osteoporosis and rheumatoid arthritis.

It can help people absorb calcium and phosphorus and make children's bones grow strong and strong. Can be used for preventing rickets and rickets in children. For adults, it can prevent osteoporosis and rheumatoid arthritis.

Third, sunbathing can prevent skin diseases.

Proper exposure of the skin to ultraviolet rays can effectively kill bacteria on the skin and increase the skin's resistance.

Fourth, sunbathing can also enhance human immune function and increase the vitality of phagocytes.

Ultraviolet rays in the sun have a strong bactericidal ability. Generally, bacteria and some viruses will be killed if they are exposed to the sun for half an hour or several hours.

5. Sunbathing can also mediate people's life rhythm and psychology.

Sunbathing can promote blood circulation, enhance metabolism and regulate the central nervous system, thus making people feel relaxed and comfortable.

6. Sunbathing can improve male androgen level, enhance sexual desire and improve sperm quality.

Because the testosterone level in human blood will increase with the increase of vitamin D content in the body. The study also confirmed once again that the daily sunshine of 1 hour can increase testosterone in human body by 69%.

Seven, prevent anemia.

Because ultraviolet rays in sunlight can also stimulate bone marrow to make red blood cells and improve hematopoietic function, thus preventing anemia.