And how much you need to apply.
Thatâ€™s why we've tapped three dermatologists to explain the steps in choosing and applying sunscreen correctlyâ€”and what could happen if you donâ€™t. Read on to find out how to properly block out those pesky UV rays.
Meet the Expert
Dr. Hadley King is a board-certified dermatologist specializing in cosmetic and surgical dermatology. She is the owner of Dr. Hadley King dermatology in New York City.
Always go for SPF 30 or higher.
Contrary to some theories, the practice of applying sunscreen is important no matter your skin tone. â€œMelanin, or the pigment of the skin, is like Mother Natureâ€™s sunscreen,â€ says Dr. Joshua Zeichner, director of cosmetic and clinical research in dermatology at Mount Sinai Hospital. â€œThat said, darker skin is thought to only give protection at about a level of SPF 3.â€ Choose at least an SPF 15, though it's even safer to stick to 30 and above.
Of course, if you have fair skinâ€”which tends to be more sensitive in generalâ€” the higher the SPF you use, the better. The fairest skin should aim for SPF 50 or higher, according to Dr. Will Kirby, board-certified dermatologist and Chief Medical Officer for LaserAway. Generally speaking, most skin tones should stick to a product thatâ€™s at least SPF 30 and has the words â€œbroad-spectrumâ€ on the bottle (which means itâ€™s effective in blocking both UVA and UVB rays).
Find the right formula for your needs.
Thereâ€™s not necessarily one type of formula thatâ€™s better than the otherâ€”itâ€™s strictly up to your preferences. (For example, I love spray sunscreen because of how convenient it is to applyâ€”but am I even applying it correctly? More on that later.)
Dr. Kirby recommends a sunblock over a sunscreen. If youâ€™re not clear on the difference, itâ€™s essentially this: A block will, as the name suggests, block UV rays, whereas a screen will absorb them. They both will be called â€œsunscreenâ€ on the label (and will be used interchangeably throughout this article), but the trick is to check the back panel for the ingredients list. â€œThe two types of blocks are titanium dioxide and/or zinc oxide,â€ he says. Technically speaking, sun-blocking formulas are called physical sunscreens, whereas formulas with ingredients that absorb are called chemical sunscreens. You can read more about the differences here.
â€œUltimately, the best sunscreen is the one that youâ€™re actually putting on,â€ says Dr. Zeichner. â€œBut with so many textures and consistencies on the market nowadays, thereâ€™s something for everyone.â€
Also, consider your skin type. If you have sensitive skin, itâ€™s best to stick to a mineral-based sunscreen that may be less likely to cause irritation. If youâ€™re acne-prone, try finding a non-comedogenic formula for the parts of your body that tend to break out. And if you have a darker complexion, thankfully the choices for non-chalky formulas are much wider than ever. We recommend Elta MD's UV Clear SPF and Drunk Elephant Umbraâ„¢ Sheer Physical Daily Defense Broad Spectrum.
Also of note: tinted sunscreens and sunblocks are specifically formulated to accommodate all skin tonesâ€”so you should be able to seek out a product that complements your complexion perfectly.
Take it slowâ€”and use more than you think you need.
Spoiler alert: Youâ€™re probably not doing it right (I know I havenâ€™t been).
â€œMost people only apply 25â€“50 percent of the recommended amount of sunscreen,â€ says Dr. King. â€œThe guidelines are to apply one ounceâ€”enough to fill a shot glassâ€”to the exposed areas of the body, or if youâ€™re using a spray, apply until an even sheen appears on the skin and rub it in.â€
Also, keep in mind that itâ€™s always a good idea to apply before you even walk outside. â€œDonâ€™t rush, and apply in front of the mirror so you can see what youâ€™re doing,â€ says Dr. Kirby. â€œApply the first layer at home before you go outâ€” when youâ€™re already out, you tend to rush.â€
If youâ€™re with someone, ask them to do your hard-to-reach areasâ€”thereâ€™s nothing worse than a sunburn on your back with the outline of an overstretched hand on it (been there).
And, generally speaking, donâ€™t forget to use your common sense. Barrier protection is essential, says Dr. Kirbyâ€”so remember to bring things like sunglasses, a hat, or extra layers (like long sleeves) with you if youâ€™ll know youâ€™ll be exposed to the sun for a prolonged period of time. And keep in mind that peak sun exposure hours are 10 a.m. to 4 p.m.â€”so be extra-cautious if youâ€™re out and about during that timeframe.
And reapply, reapply, reapply.
Fun fact: No sunscreen is â€œsweat-proofâ€ or â€œwaterproofâ€ anymore, according to the Food and Drug Administration. â€œInstead, the label will say â€˜water-resistantâ€™ and for how many minutes, typically either 40 or 80,â€ says Dr. King. So make sure to reapply after any watery activity within that time frame.
Regardless of activities, though, you should always reapply at least every two hours, or the SPF level will get diluted, according to Dr. Zeichner.
Not in the sun? You still need to apply.
You might roll your eyes at this, but itâ€™s so important to wear sunscreen on any exposed body part, regardless of the weather or climate, even if youâ€™re only outside while youâ€™re walking to the subway in the morning.
â€œIncidental exposure adds up quickly and UVA can penetrate cloud cover,â€ says Dr. Kirby. â€œSo even if you donâ€™t burn in the winter, youâ€™ll still get premature aging from unintended sun exposure.â€
In fact, studies in Australia tracked the skin of those who use sunscreen every dayâ€”despite the weather or daily activitiesâ€”and those who used it only when it was particularly sunny outside. The results? Those who applied sunscreen every single day had skin that aged significantly slowerâ€”24% less in the daily sunscreen group than in the discretionary sunscreen group.
Incidental exposure will definitely add up over a lifetimeâ€”so donâ€™t take any chances. Dr. Zeichner compares applying sunscreen to brushing your teeth: If you miss one day, there probably wonâ€™t be major consequencesâ€”but if you stop brushing altogether, youâ€™ll get cavities. Similarly, missing a single day of sunscreen during your regular commute likely has little impact, but missing every day will equate to a lot of exposure over your lifetime.
What about the face?
Typically, you can apply the same sunscreen you use on your body to your face, unless youâ€™re acne-prone (in which case, again, you should find a good non- comedogenic formula, like these formulas that we love).
But you need to be extra-careful with your visage. This means not spraying directly onto your face (if you have spray sunscreen, put it in your hands first, then rub it in) and also covering all of your bases.
â€œIâ€™ll tell my patients to apply from the center of the face and then rub outwards into the hairline so there arenâ€™t any missed areas,â€ says Dr. Zeichner. Commonly missed areas include the hairline, your hair part, the neck, and your earsâ€”so make sure to give those areas some extra love. According to Dr. King, you should be applying about a quarter-sized dollop worth of sunscreen to your face alone.
Of course, makeup with sunscreen baked in is popular for a reason, and that works too. But it gets tricky when it comes to reapplying throughout the day if youâ€™re wearing a full face of foundationâ€”which is why Dr. King recommends a powder formula, like Mineral Powder Sunscreen from Brush on Block. Not only does it offer physical protection with zinc and titanium, itâ€™s also the perfect texture to go over makeup. â€œPowder is easy to apply so you wonâ€™t complain about greasiness, and itâ€™s totally smell-free and translucent. Itâ€™s portable, convenient, and the perfect way to reapply over makeup.â€
American Academy of Dermatology Association. Sunscreen FAQs.
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