Sunscreen FAQs: What Type of Sunscreen Should You Use?
Sunscreens come in many formulas and types—it can take trial and error to find one you like. Here’s information to keep in mind when shopping for a sunscreen that works for you.
By Mirela Draganescu, MD, Virtua Primary Care
Whether you spend time at the beach, in the mountains, by the pool, or in your own backyard this summer, you’ll expose your skin to the restorative, but also harmful, rays of the sun.
While it’s important to apply sunscreen every time you go outside, even on overcast days, choosing the right one can be confusing. Sunscreens come in many formulas and types, such as creams, sprays, and sticks—it can take trial and error to find one you like.
The important thing is to avoid sunburn. Repeated sunburns are a leading cause of melanoma, the deadliest form of skin cancer. Here are frequently asked questions that can help you when finding the best sunscreen for you.
Does double the SPF mean double the protection?
No! SPF, or sun protection factor, measures how long it takes for ultraviolet (UV) B rays to burn your skin when wearing sunscreen compared with when you’re unprotected. For instance, if you choose SPF 15, it will take your skin 15 times longer to turn red than if you use nothing at all.
SPF 15 sunscreen—the lowest number now allowed by the FDA—blocks 93 percent of UVB rays. The American Academy of Dermatology recommends using at least SPF 30, which blocks 97 percent.
No matter what SPF you choose, reapply at least every two hours.
Is sunscreen waterproof?
No, sunscreen is not waterproof, but brands may be labeled “water-resistant” or “very water-resistant". When brands are labeled “water-resistant”, they will last through 40 minutes of swimming or sweating. “Very water-resistant” means that you’ll have 80 minutes of protection in these conditions. You should always reapply after you get out of the pool or finish a workout.
What is the difference between UVB rays and UVA rays?
UVB rays are what cause sunburn, but UVA rays cause wrinkles and age spots. Both rays contribute to skin cancer. Choose a product labeled “broad spectrum.” This means it filters out both UVA and UVB rays.
How much sunscreen should I use?
Getting the amount of protection advertised on the label requires a generous coating. You should use about an ounce to cover your body—enough to fill a shot glass.
Should I apply sunscreen only in the summer?
No! You should be applying sunscreen all year long! UV rays are present throughout the entire year and can be reflected from both snow and sand. Up to 80% of UV rays pass through clouds as well, which is why you can still get sun damage on a cloudy day.
What is the best sunscreen to buy?
You should choose products labeled “broad spectrum”. This means it will filter both UVA and UVB rays. You should also consult your primary care provider when making any other choices for sunscreen such as whether to do mineral sunscreen or chemical sunscreen, sunscreen for sensitive skin, and if you should find a sunscreen that is labeled non-comedogenic. The best sunscreen is always the one that will suit your needs!
Make skin health part of your annual checkup
Sun safety starts with simple habits like wearing broad-spectrum sunscreen, covering up, and limiting time in direct sunlight.
Do not wait for a problem to show up. Talk to your primary care provider during your annual exam about any skin changes or concerns.
To schedule your appointment, call 888-847-8823.
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