As a practicing dermatologist for over 20 years, I am regularly surprised when patients tell me they love sun bathing and spend hours in the direct sun, that SPF isn\u2019t really important in suntan lotion or that tanning beds aren\u2019t really too risky. When it comes to skin safe sun habits, people have a lot of misinformation. Many people seem to know that laying out in the sun for hours and getting a blistering sunburn is not good for their skin. Fewer seem to know that even getting a nice brown tan is also bad, How much time in the sun is OK? How often should suntan lotion be applied? Do the SPF numbers matter?\u201d Misconceptions about sun exposure are plentiful and put people at risk for skin cancer. Here are five common misconceptions about sun related skin risks and prevention. Getting a \u201cbase tan\u201d prevents sunburn: This is false. A base tan itself causes damage to the skin. Repeated exposure to UV radiation, even without a sunburn, causes wrinkling and may lead to cancer later in life. While many people associate a suntan with wealth and success, the truth is that a tan is simply the result of sun damage. It is evidence that your skin has been exposed to ultraviolet radiation. We advise our patients to use a self-tanner for a summer glow. This way you\u2019ll get that tanned look without any damage to your skin.\u201d The higher the sunscreen SPF the better. The sun protection factor, or SPF, refers only to UVB rays. To get UVA protection, a sunscreen labeled \u2018broad spectrum\u2019 or one that contains a physical block like titanium dioxide is required. UVB protection doesn\u2019t increase proportionately with the SPF number. SPF 30 screens about ninety-seven percent of the UVB rays, whereas SPF 15 screens ninety-three percent. I recommend SPF 50 in the summer months and SPF 30 or greater year round. Sunscreen needs to be applied only once a day Using too little sunscreen in effect reduces a product\u2019s SPF-and leaves the skin exposed to sun damage. To clarify: the rule is to apply about an ounce, the approximate amount of a shot glass, over your body and to reapply it every two hours. It is recommended that people apply and reapply sunscreen more often if you\u2019re swimming, sweating or playing sports. Sunlight provides the Vitamin D the body needs Vitamin D is essential, but sun exposure is not essential for Vitamin D production. I recommend a healthy diet with plenty of natural and fortified foods, along with a supplement of up to 1000 units of Vitamin D per day, will make up for any Vitamin D deficiencies. Tanning beds are less risky than a day at the beach Millions of Americans visit tanning salons every year, and most don\u2019t realize they\u2019re unsafe. People who first use a tanning bed before age 35 increase their risk for melanoma by 75 percent. Many states have put restrictions on tanning beds for people under age 18, and some states require parental consent. We advise our patients to steer clear of tanning beds altogether. In conclusion, the best defense against sun damaged skin in prevention. The few moments a day needed for protecting your skin from the sun will reduce your risk of skin cancer and the bonus will be that you will have healthier and younger looking skin. Meryl Joerg, M.D., is board certified and specializes in dermatology at Advanced Dermatology P.C.