Sunbathing can help people get vitamin D. The source of vitamin D3 contained in human skin is made by getting ultraviolet rays from sunlight and converted into vitamin D, which can help people absorb calcium and phosphorus and make children's bones grow strong and strong.
Sunbathing can also enhance human immune function and increase the vitality of phagocytes. Ultraviolet rays in the sun have a strong bactericidal ability, and ordinary bacteria and some viruses will be killed in the sun.
Sunlight can stimulate the production of dopamine, which helps to prevent the axial length of the eye from becoming longer, thus preventing the focus of light entering the eye from being distorted when focusing. Get more sunshine and outdoor activities to reduce the risk of myopia.
Melatonin produced by the pineal gland of the human brain is mainly secreted slowly when the light is strong; It secretes quickly when the light is weak. When the concentration of melatonin in human body reaches a certain standard, it will make us sleepy. Sunbathing during the day can slow down the secretion of melatonin in the body.