Sun Exposure: Finding a Balance

woman sun sunglasses Skin cancer is the most common type of cancer diagnosed in the United States. Since the main cause of skin cancer is ultraviolet (UV) rays from the sun, people are conscious of the harmful effects of sun exposure. Reducing your risk for skin cancer includes covering yourself with high SPF (sun protection factor) sunscreens and avoiding midday sun. While there are still many sun worshipers out there, most people are now aware of the risks of sun exposure.Experts suggest the following:

  • Use sunscreen. Make sure the sunscreen protects against UV radiation.
  • Do not stay out in the sun for a long time, especially when the sun is at its strongest (mid-morning to late afternoon).
  • Wear long sleeve shirts and long pants. It is also a good idea to wear sun hats and sunglasses when outdoors.
  • Do not use sunlamps and tanning booths.
The sun, however, does have certain health benefits. It can enhance your mood, protect against certain diseases, and boost your level of vitamin D. So should people work to balance their level of sun exposure—finding a common ground between getting enough, but not too much, rather than avoiding the sun altogether?

Sunlight and Skin Cancer

Melanoma is the most deadly form of skin cancer. While non-melanoma skin cancers (basal and squamous cell carcinomas) rarely spread, melanoma can spread to other parts of the body. Ultraviolet rays from the sun are the main cause of skin cancer. Where you live may also be a risk factor. For instance, a study published in the Archives of Internal Medicine found that people who live in states with a higher level of UV rays from the sun had an increased risk of squamous cell carcinoma. States with a higher amount of UV rays included Connecticut, Indiana, Arizona, California, and North Carolina.

The Benefits of the Sun

Mental Health

The warmth and light generated by the sun can enhance your feeling of well-being. Sun exposure can also help prevent seasonal affective disorder, a condition that results in bouts of depression in the late fall and winter, when exposure to sunlight is reduced.

Vitamin D

Furthermore, the sun triggers your skin to synthesize vitamin D. While vitamin D is found in foods, including fortified milk and cereals, cod liver oil, and certain fish, many people do not get enough of it from foods, so the sun provides most people with their vitamin D requirement. The catch is that sunscreen blocks the production of vitamin D.With 10-15 minutes of sun exposure to the face, arms, hands, or back without sunscreen at least two times per week, most people can get an adequate level of vitamin D. However, people who live in northern or cloudy climates during certain times of the year may not be able to synthesize enough vitamin D from the sun. Adequate levels of vitamin D prevent rickets in children and osteomalacia in adults (both are diseases that weaken bones). In addition, vitamin D may help maintain a healthy immune system, promote normal cell growth, and prevent osteoporosis.Researchers do not yet know for sure, but some propose that increased levels of vitamin D associated with sun exposure may also have anti-cancer effects. In laboratory studies, vitamin D has been shown to inhibit cancer cell growth and induce death of cancer cells.

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