There are two types of sunscreens: physical and chemical. Physical sunscreens use UV filters while chemical sunscreens use chemical filters. The physical sunscreens protect your skin from the sun by blocking the rays. These usually contain Titanium Dioxide and Zinc Oxide.
Some may be allergic to Titanium Dioxide. Zinc oxide is generally safe and can be used on sensitive skin. It is used in diaper creams. Titanium Dioxide protects against UVB rays but not the full spectrum of UVA; zinc oxide protects against UVA and UVB. Therefore, it is best to choose a sunscreen that protects against both.
Chemical sunscreens offer more coverage against UVA, but the range of protection will depend on how stable and active the product is. Avobenzone is a product contained in the chemical sunscreen and protects against UVA, but it is advisable to wait 20 minutes after applying to obtain effective sun protection.
Choose a broad spectrum sunscreen which protects against both rays. Remember, sunscreens need to be reapplied, especially after swimming and even on “shady” days. Many patients tell me that they try not to go in the sun, but the reflective rays are present through windows. On a cloudy day, 80 percent of the sun’s UV rays pass through clouds, 17 percent reflect on sand and 80 percent reflect on snow.
Here’s a few tips: apply sunscreen 30 minutes before going out. Apply liberally and allow to dry thoroughly. Use a lip balm that contains an spf of 15 +. Waterproof sunscreen loses effectiveness after 80 minutes; water resistant, after 40 minutes.
Sun-protective hats, sunglasses and clothing are also available to shield you from the sun. Wear your sunscreen daily. Many formulations can be applied prior to makeup. Makeup alone is not sufficient to block these harmful rays. Skin cancers occur everywhere, but mostly on the sun-exposed areas, especially the face, ears and scalp.
It is important to take the extra step and apply sunscreen before going out. For any questions about the type of sunscreen that is best for you, please call me at Opalescense.
Sandra Thornhill, FNP-C
Opalescense Day Spa 985-612-7245
