Sunscreens protect your skin from ultraviolet (UV) rays encountered not only on the beach, but in everyday life as well. UV rays do more than give you a sunburn: They cause premature aging and skin cancer, too. Don’t forget that the sun shines all year long – even in the winter. The American Academy of Dermatology recommends using sunscreen if you will be outdoors for 20 minutes or more each day. Almost everyone sees that much time outdoors, if not more.
Sunscreen is a skin protectant that absorbs and/or reflects UV radiation, preventing it from harming your skin. Sunscreen comes in many forms, including lotions, sticks and sprays. Most lip balms now provide UV protection. Many new moisturizing lotions also provide UV protection as well.
SPF stands for Sun Protection Factor. The SPF measures the ability of the sunscreen to protect against UVB rays, the rays that cause sunburn. For example, an SPF of 15 should give you 15 times more protection from sunburn than unprotected skin. An SPF of at least 15 is recommended by most dermatologists.
Use a shot glass as your guide for how much to use. One ounce of sunscreen should cover just about anyone. It is recommended that you apply sunscreen at least 15 minutes to a half hour before going outside. You should also reapply after towel drying and after strenuous exercise. Applying before you dress in the morning should cover this. Don't miss those frequently forgotten areas like ears and the backs of hands, either.
Any brand is fine, as long as it has an SPF of at least 15. There are many types and scents to choose from. You may want an unscented type if flying insects like mosquitos are currently a problem in your area. Also, look for broad spectrum UVA/UVB coverage. Many people choose one type for everyday use, and another type for more demanding situations, like outdoor picnics or a day at the beach.
Last year's sunscreen should still have all of its effectiveness. Keep this in mind: If you are using last year's sunscreen, you are probably not using it properly. Remember, one ounce per application once per day means that an eight-ounce bottle of sunscreen should only last eight days.