Talking about the benefits of sunbathing to human health.

Sunbathing can delay aging, among which vitamin D plays a role. Studies have shown that people with higher levels of vitamin D are about 5 years younger than those with lower levels of vitamin D, and 90% of the vitamin D needed by the human body needs to be obtained through the sun. Skin gets ultraviolet rays from sunlight to make vitamin D3, and then the body converts vitamin D3 into active vitamin D. This kind of vitamin helps to promote the absorption of calcium and phosphorus and promote the formation of bones, so vitamin D is also called "sunshine vitamin".

According to research, every square centimeter of skin exposed to the sun for 3 hours can produce about 20 international units of vitamin D. Even if the baby is wrapped tightly, as long as the face is exposed to the sun every day 1 hour, it can produce 400 international units of vitamin D. Close to the baby's daily vitamin D requirements.

Sunbathing can help people get vitamin D, which is also the main source of vitamin D, also known as "sunshine vitamin". The source of vitamin D3 contained in human skin is made by obtaining ultraviolet rays from sunlight and converted into vitamin D, which can help the human body 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.

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.

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.

Sunshine also has a certain mediating effect on 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.

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%.

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