What is the best time to bask in the sun every day?

First, calculate the time it takes for your skin to get red (not sunburned) by the sun. In the future, the whole body 1/4 skin should be exposed to the sun every time, and the duration should be 25% of the time required for the skin to turn red. Fair-skinned people only need to expose their arms, hands and face to the sun for 5 ~110 minutes between10 and 3 pm every day, while dark-skinned people can spend a little longer than this.

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Eight benefits of sunbathing:

Sunlight is not only an "activator" of vitamin D, but also one of the natural "health care drugs". Sunbathing can cause a series of physiological changes, such as accelerating blood circulation, promoting the production of vitamin D and the absorption of calcium, preventing osteoporosis and killing various viruses and bacteria. In fact, in addition to these benefits, sunshine has many functions that you haven't noticed.

1, myopia prevention. A study by the Australian National University pointed out that lack of sunlight may be one of the causes of myopia. Researchers believe that sunlight can stimulate the production of dopamine, which helps to prevent the axial length of the eye from becoming longer, thus preventing the focus distortion of the light entering the eye when focusing. Therefore, more sunshine and outdoor activities can help bookworms reduce the risk of myopia.

2. Reduce colds. A study by Yale University School of Medicine found that regular sun exposure can help reduce the harm of influenza virus and other common respiratory diseases. Researchers believe that maintaining a high level of vitamin D in the body can better prevent problems such as sore throat, common cold and stuffy nose. Compared with people who spend less time in the sun, people living in sunny areas are less likely to be infected with influenza virus.

3. Blood vessels are healthier. A study published in the British Medical Journal found that people with low levels of vitamin D have a higher risk of heart disease, heart failure and stroke. Many studies have also confirmed that the number of patients with myocardial infarction will increase significantly in winter when ultraviolet rays are scarce. Proper sunlight will help vitamin D become more active, thus reducing inflammation in the body and being more conducive to blood vessel health.

4. prolong life. Since 1980, Danish researchers have studied 4.4 million Danmai people for 26 years, and found that more sunshine can prolong their life. Inge Henshipp Clemmensen of the Danish Cancer Institute also believes that those who often bask in the sun go outdoors more often than those who always stay at home or in the office, which is also an important reason for good health.

5, improve hormone levels. One of the cheapest natural viagra may be to get more sunshine. Researchers at Graz Medical University in Austria found that the level of testosterone in the body will change with the fluctuation of vitamin D content. After autumn every year, the levels of vitamin D and testosterone in human body will decrease synchronously, and will reach the lowest in March next year. This has little to do with sunbathers. According to the study, the daily 1 hour sunlight can increase the testosterone in the body by 69%.

6. Reduce the risk of cancer. A study by the University of San Diego in the United States shows that women living in low latitudes have a lower risk of ovarian cancer than women living in high latitudes, because the former has a long sun exposure and a high intake of vitamin D, which is more conducive to cancer prevention than the latter.

7. Less depression. It is found that the secretion levels of adrenaline, thyroxine and gonad will increase under sufficient sunlight, thus effectively improving the negative psychology such as depression and mental depression. Liu Baofeng, a senior psychological counselor of China Mental Health Association, pointed out that in winter and rainy weather, many people suffer from insomnia, chest tightness and irritability. The reduction of sunshine time is one of the reasons for seasonal affective disorder.

8. Enhance immunity. Yang Li, a professor at the Graduate School of Chinese Academy of Traditional Chinese Medicine, told reporters that sunbathing has the function of tonifying yang and benefiting qi. Traditional Chinese medicine has the theory of "collecting the essence of the sun", that is, collecting sunlight to produce the qi of clearing yang. The normal viscera function in the human body is supported by yang, and if yang is sufficient, the disease resistance of the human body will be improved. Righteousness is relative to exogenous evil. Sunbathing can strengthen the body and enhance immunity.

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