Newswise — Remember this as you enjoy summer outdoor activities: There's no such thing as a safe tan.
About 90 percent of skin cancers are linked to sun exposure. Although people with light skin are more susceptible to sun damage, all types of skin can be affected. Sunscreen is one of the easiest ways to protect exposed skin. The May issue of Mayo Clinic Health Letter offers tips on sunscreen use:
Buy adequate protection - Choose a sunscreen with a sun protection factor (SPF) of at least 15. Many dermatologists recommend an SPF of 30. Be sure it protects against ultraviolet (UV) A and B rays.
Select a sunscreen that suits you and your needs - Use a waterproof brand if you'll be swimming. Use a water-based sunscreen if you are prone to acne. If your skin reacts badly to the sunscreen, try one with different ingredients.
Prepare in advance - Apply sunscreen 30 minutes before you go outside. Use it even on cloudy days. UV rays can penetrate cloud cover.
Apply thickly and thoroughly to all exposed skin - A liberal application is one ounce, about the amount in a shot glass. Most people don't use enough.
Reapply regularly - Reapply every two hours. Heavy perspiration, water and towel drying can remove sunscreen.
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