Best sunscreen: Understand sunscreen options
Best sunscreen: Understand sunscreen options
Confused about the best sunscreen to use? Wondering whether sunscreen can be harmful? Lawrence Gibson, M.D., a dermatologist at Mayo Clinic, Rochester, Minn., offers his guidance.
Lawrence E. Gibson, M.D.
What's the best way to sort through information about sunscreens?
Start by remembering the bigger picture when it comes to sun safety and what you can do to protect yourself. For example:
Is there any truth to the claim that sunscreen use encourages excessive sun exposure and, as a result, increases the risk of skin cancer?
Most experts strongly disagree with this claim. Research also hasn't shown a link between sunscreen use and an increase in the risk of skin cancer. On the other hand, research has shown that use of sunscreen can reduce the risk of melanoma, the most serious type of skin cancer.
What does a broad-spectrum sunscreen do?
There are two types of UV light that can harm your skin — UVA and UVB. A broad-spectrum, or full-spectrum, sunscreen is designed to protect you from both.
UVA rays can prematurely age your skin, causing wrinkling and age spots. UVB rays can burn your skin. Too much exposure to UVA or UVB rays can cause skin cancer. The best sunscreen offers protection from all UV light.
Does the best sunscreen also have the highest SPF?
SPF stands for sun protection factor, which is a measure of how well the sunscreen deflects UVB rays. Manufacturers calculate SPF based on how long it takes to sunburn skin that's been treated with the sunscreen as compared with skin that hasn't been treated with sunscreen.
Theoretically, the best sunscreen has the highest SPF number. It's not that simple, however. When applied correctly, a sunscreen with an SPF of 30 will provide slightly more protection from UVB rays than does a sunscreen with an SPF of 15. But the SPF 30 product isn't twice as protective as the SPF 15 product. Sunscreens with SPFs greater than 50 provide only a small increase in UVB protection.
Also, keep in mind that sunscreen is often not applied thoroughly or thickly enough, and it might be washed off during swimming or sweating. As a result, even the best sunscreen might be less effective than the SPF number on the bottle would lead you to believe.
Rather than looking at a sunscreen's SPF, choose a broad-spectrum sunscreen that will protect you from UVA and UVB rays.
What do I need to know about sunscreen ingredients?
Sunscreens contain filters that reflect or absorb UV rays. There are two main types of sunscreens:
Sunscreens also might contain:
Some sunscreens also contain the antioxidant retinyl palmitate, a form of vitamin A or retinol. Antioxidants are substances that neutralize free radicals — unstable oxygen molecules that break down skin cells and cause wrinkles. While concerns have been raised about sunscreens containing retinyl palmitate, research currently suggests it's safe. However, recommendations regarding safety for use during pregnancy aren't available. If you're concerned, consider avoiding sunscreens containing this ingredient during pregnancy.
Are some brands of sunscreen better than others?
Brand matters less than how you use the product. In general, look for water-resistant, broad-spectrum coverage with an SPF of at least 15. Check the sunscreen's expiration date, and follow the directions on the label.
Also, keep in mind that labeling guidelines for sunscreen in the United States are changing. Under new Food and Drug Administration guidelines:
Ultimately, it's important to find a sunscreen you like. If you don't care for the sunscreen, you're not as likely to use it consistently.
Should I use a spray sunscreen or a lotion?
The kind of sunscreen you use is up to you. However, certain types of sunscreen work best on specific areas of the body. If you have dry skin, you might prefer a cream — especially for your face. A gel or spray might work better for areas covered with hair, such as the scalp or a man's chest. Parents often prefer sprays because they're easy to apply on children. When using spray sunscreen, be sure to apply a generous and even coating. Avoid inhaling the product.
Do I need to apply sunscreen even if I wear cosmetics that contain sunscreen?
It depends on how much time you'll be spending in the sun. If you wear cosmetics that contain sunscreen, such as moisturizer, foundation or lipstick, you'll need to reapply them every two hours when outside or also apply a separate sunscreen.
If you won't be spending much time outdoors and you don't wash your face or heavily sweat during the day, it's OK to apply a moisturizer containing sunscreen just once in the morning.
What else is important to remember about using sunscreen?
When you use sunscreen:
You can apply sunscreen to children as young as age 6 months. Keep younger children in the shade as much as possible.
Use sunscreen year-round, but don't let any product lull you into a false sense of security about sun exposure. A combination of shade, clothing, sunscreen and common sense is your best bet.
Last Updated: 2013-06-04
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