We should decide how long it will take to get good results according to our own experience, and we don't need to be naked in the sun to synthesize vitamin D at all, just wear short-sleeved shirts and shorts.
In addition, we should pay special attention to the fact that excessive exposure can easily turn human moles into melanoma or skin cancer. When in the sun, we must wear sunscreen clothes to cover the parts with moles.
It is best to wear red clothes in the sun, because the long-wave radiation of red clothes can quickly "eat" the short-wave ultraviolet rays with strong lethality, and it is best not to wear black clothes.
When basking in the sun, you should take off your hat and gloves, expose your skin as much as possible, and let the sun get in close contact with your skin. Sunbathing through the glass window is not effective. It is best to be outdoors or on a spacious balcony.
Extended data
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 regulating 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%.
Baidu encyclopedia-basking in the sun