Advantages and disadvantages of sun exposure

From a scientific point of view, 90% of the vitamin D required by the human body depends on the sun to get it. Let’s learn more about the benefits of sunbathing. 

The benefits of sun exposure

Reduce the incidence of depression. 

Studies have found that in sufficient sunlight, the human body adrenaline, thyroxine and sex hormone secretion levels will be increased, which will effectively improve depression, depression and other unhealthy psychological. Health Association senior psychological counselor pointed out that many people a winter and rainy weather will be insomnia, chest tightness, fidgety. The decrease of sunshine time is one of the causes of seasonal affective disorder. 

Prevention of myopia. 

Lack of sunlight may be one of the causes of myopia, according to a study by the Australian National University. Sunlight stimulates the production of dopamine, while dopamine helps prevent the axis of the eye from lengthening and thus preventing the focus of light entering the eye from distorting when focused, the researchers analyze. Therefore, more sun, more outdoor activities, can reduce the risk of myopia. 

Reduce colds. 

A study by Yale University School of Medicine found that exposure to the sun helps reduce the risk of influenza viruses and other common respiratory diseases. Researchers believe that keeping high levels of vitamin D in the body is a better way to prevent problems such as sore throat, common cold and nasal congestion. People who live in sunny areas are less likely to catch the flu virus than people who have less sun exposure. 

Protection of vascular health. 

A study published in the British Medical Journal found that people with low levels of vitamin D had a higher risk of heart disease, heart failure and stroke. Several studies have also confirmed that there is a significant increase in the number of patients with myocardial infarction during the winter months when ultraviolet light is scarce. Proper exposure to the sun helps make vitamin D more active, leading to less inflammation in the body and better vascular health. 

Prolong life. 

Since 1980, Danish researchers have studied 4.4 million Danes for up to 26 years and found that more sun exposure extends their lives. Ings Hensp Clemson of the Danish cancer institute also believes that people who spend a lot of time in the sun go outdoors more often than those who stay at home or in the office, which is also an important reason for the health benefits. 

Increase hormone level. 

One of the cheapest natural “Viagra” is probably sunbathing. Researchers at Gratz Medical University in Austria have found that testosterone levels vary as vitamin D levels fluctuate. Levels of vitamin D and testosterone fall synchronously each year in the fall and reach their lowest levels in March of the following year. This has something to do with the fact that people rarely bask in the sun. The study also found that exposure to the sun for an hour a day increased testosterone by 69%. 

Reduce cancer risk. 

A study by the University of San Diego found that women living at lower latitudes had a lower risk of ovarian cancer than those at higher latitudes because they were exposed to sunlight for longer periods of time and had higher levels of vitamin D. It’s better for cancer prevention than the latter.

What’s the harm of basking in the sun?

The downside of sun exposure is that too much sun can lead to dermatitis melanin sunburn and even skin cancer.

Sun dermatitis.

Sunburn dermatitis, also known as pleomorphic sunrash, is a common light-sensitive skin disease in young and middle-aged women, often seen in spring and summer, often repeated. Should avoid the intense sunlight as far as possible, when going out pays attention to shade or liniment light-proof agent such as 5%-10% amino-benzoic acid tincture or emulsion, 5% peptide dioxide cream and so on. Small doses of long-wave and / or medium-wave ultraviolet radiation can be tested before the onset season and gradually extended to improve the skin resistance to ultraviolet radiation.


There’s a lot of ultraviolet light in the sun. When ultraviolet light (B wave, A wave) irradiates the skin (B wave namely UVB acts on the basal layer of the skin, and A wave is more powerful, acting on the dermis of the skin), the skin will be in a state of self-protection, and the skin will be stimulated by ultraviolet light to stimulate the maranin pigment. Activates tyrosinase activity to protect our skin cells.

Tyrosinase reacts with tyrosine in the blood to form a substance called dopa. Dopa is actually the forerunner of melanin, oxidized by tyrosine, released melanin, skin epidermis will form freckles, sunspots, blackspots, and so on.

Skin burn.

Prolonged exposure to the sun can burn the skin and hurt the eyes. The Huffington Post recently pointed out that short-term exposure to ultraviolet rays can burn the eyes, while long-term exposure to ultraviolet rays can lead to eyelid cancer, cataracts and speckle degeneration. Dr. Calmey, an American ophthalmologist, cautions against eye protection, even in winter.

  • Buy a good pair of sunglasses, the frame edge of the face of the sunglasses can be all-round protection of ultraviolet.
  • 2 wear a wide-brimmed hat out of the door, the hat can withstand half of ultraviolet radiation, dark wide-brimmed hat has better protective effect.
  • The sun’s ultraviolet rays are strongest between 311 and 14:00, and it is best to avoid this period of time.

Suffer from skin cancer.

The more the sun shines, the greater the risk of skin cancer, according to research published in the United States. This is the first study to show that the cumulative intensity of sunlight in a person’s lifetime is directly related to the likelihood of melanoma formation. Melanoma is one of the most serious skin cancers. For every 10% increase in average annual exposure to sunlight, the risk of melanoma increases 19% for men and 16% for women.

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    Uuuf cholesterol is converted to cholicalceferol which is for the bones , vitamin d absorb magnicium which is required for muscles nerves deficiency lead to whitening of hairs depressions anxiety loss of appetite aggressive mood burning stools settings constipation palpitations s. Vitamin d deficiency impair zinc metabolism and this lead to diabetes, depression immune system, so we need bitter and sunlight on skin for prevention of human I duce diseases in humanbeings and animals.

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