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When you do go outdoors, especially for long periods in the middle of the day.
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The ultraviolet rays, which cause sunburn, are strongest during this time.
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But today, many foods are fortified with vitamin D during the manufacturing process. You may have been taught that you need sunlight for your body to make vitamin D, because vitamin D is not found naturally in most foods. Doctors believe that most skin cancers can be avoided by preventing sun damage. However, the sun's most serious threat is that it is the major cause of skin cancer, which is now the most common of all cancers. Although the skin appears to be thicker, it actually has been weakened and, as a result, it will bruise more easily. With repeated sun damage, the skin starts to look dry, wrinkled, discolored, and leathery. If you looked at sunburned skin under a strong microscope, you would see that the cells and blood vessels have been damaged. The immediate danger of too much sun is sunburn.
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