How to Buy the Absolute Best Sunscreen for Your Skin Type, According to Derms

If you ask any dermatologist what the number one skincare product you should be using is and chances are that they'll all say the same thing: sunscreen. Not only can unprotected sun exposure lead to melanoma, but it can also cause your skin to age prematurely, leading to wrinkles, fine lines, and dark spots. Wearing sunscreen every day (yes, even on cloudy days or days when you'll be indoors near a window) is the best way to protect your skin from harmful UV rays. 

With so many sunscreens on the market, it's hard to know how to pick the best sunscreen for your skin type and concerns. I spoke to top derms to find out how to choose the right sunscreen for you, but first, it's important to understand the basics.

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How exactly does sunscreen work?

Sunscreen is packed with ingredients that work to make sure your skin it protected from UV light. "Sunscreen either works by scattering UV rays from the skin or absorbing the UV energy and converting it to heat, keeping it from penetrating the DNA of skin," says Ellen Marmur, MD, board-certified dermatologist and founder of MMSkincare.

What is the difference between chemical and physical sunscreen? Is one better than the other?

"The ingredients in sunscreen act as filters to UV light," says Mona Gohara, MD, Associate Clinical Professor of Dermatology at the Yale School of Medicine. "They either absorb the UV like a sponge (chemical sunscreen) or deflect them like a shield (mineral sunscreen)."

As far as ingredients go, Josh Zeichner, New York–based board-certified dermatologist at Mount Sinai says that mineral sunscreen has ingredients like zinc oxide or titanium dioxide to filter out UV rays, while chemical sunscreens have chemicals that contain carbon molecules called organic filters. 

When it comes to one being better than the other, it's really up to personal preference and making sure you're using them properly. Marmur emphasizes that when it comes to sunscreen, the key is to reapply often and liberally. 

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"I personally prefer and am more likely to use mineral sunscreens because I like that they often have iron oxide as an ingredient," says Gohara. "Iron oxide protects against indoor blue light rays. Blue light comes from the computer screen, cell phones, and light bulbs and can be damaging to the skin as well."

Zeichner says there are pros and cons to each option. "Mineral sunscreens tend to be less irritating to the skin, so they are helpful in children or in people who are sensitive," he says. "However, mineral sunscreens may feel heavier and leave behind a white cast on the skin. Chemical sunscreens tend to feel more light and sheer. Plus, ultra-high SPF levels are able to be achieved with chemical sunscreens."

What's the deal with SPF? What does it mean, and what number should I choose?

"SPF stands for sun protection factor," says Gohara. "The number on the bottle works like this: if someone's skin usually takes about ten minutes to burn, SPF 30 will protect them 30 times longer (300 min)." Gohara and Marmur agree that you should always opt for at least SPF 30. 

"Since SPF only refers to a sunscreen's ability to protect you against UVB rays, it is important to also look for the words 'broad-spectrum' on the bottle," This means that the product will protect you against both UVA and UVB rays.

If you're going to be in a situation with high sun exposure, Marmur recommends bumping up your SPF protection to at least SPF 50. If you're sweating or will be in the water a lot, make sure you choose a water-resistant option.

How often should I re-apply sunscreen, and how much do I use?

Reapply your sunscreen every 45 minutes to two hours, or immediately after swimming or sweating to stay protected. "It is always good to apply a generous layer, but a shot glass worth for the body and a dime-size for the face will work fine," says Marmur. "Sunscreen doesn't rub in, so when you think you are rubbing it in for it to absorb, you are probably rubbing it off and losing protection." When in doubt, apply more than you think you need to. 

Our top picks for every concern:

Best Overall Sunscreen: La Roche-Posay Anthelios 50 Mineral Ultra-Light Sunscreen

Best Value Sunscreen: Melé Dew the Most Sheer Moisturizer SPF 30

Best Mineral Sunscreen: Versed Guards Up SPF 35

Best Sunscreen for Dry Skin: Glow Recipe Watermelon Glow Niacinamide Sunscreen SPF 50

Best Sunscreen for Oily Skin: Supergoop! Unseen Sunscreen SPF 40

Best Sunscreen for Combination Skin: Live Tinted Hueguard 3-in-1 Broad Spectrum Mineral SPF 30 Primer

Best Sunscreen for Acne-Prone Skin: EltaMD UV Clear Broad-Spectrum SPF 46

Best Drugstore Sunscreen: Alba Botanica Sensitive Mineral Sunscreen Lotion SPF 30

Best Luxe Sunscreen: La Mer The Broad Spectrum SPF 50 Daily UV Protecting Fluid Sunscreen

Best Matte Sunscreen: Skinceuticals Physical Matte UV Defense SPF 50 

Best Tinted Sunscreen: MDSolarSciences Mineral Tinted Creme SPF 30 Broad Spectrum UVA-UVB Sunscreen

Best Sunscreen for Sensitive, Eczema-Prone Skin: Neutrogena Sensitive Skin Face Liquid Mineral Sunscreen with Broad Spectrum SPF 50

Best-Smelling Sunscreen: Vacation Classic Lotion Broad Spectrum SPF 30 Sunscreen

Best Reef-Safe Sunscreen: MMSkincare Sasha Suncare Tinted Mineral Sunscreen SPF 50+

Best Sunscreen for Dark Skin: Black Girl Sunscreen Moisturizing Sunscreen Lotion SPF 30

Best Color-Correcting Sunscreen: Dr. Jart+ Cicapair Tiger Grass Color Correcting Treatment SPF 30

Best Natural Sunscreen: Kinship Self Reflect Probiotic Moisturizing Sunscreen Zinc Oxide SPF 32

Best Powder Sunscreen: Colorescience Sunforgettable Total Protection Brush-On Shield SPF 50

Best Body Sunscreen: Supergoop! Play Everyday Lotion SPF 50 Sunscreen

Best Budget-Friendly Body Sunscreen: Hawaiian Tropic Antioxidant Plus Sunscreen Lotion SPF 50

Best Overall Sunscreen: La Roche-Posay Anthelios 50 Mineral Ultra-Light Sunscreen

Best Value Sunscreen: Melé Dew the Most Sheer Moisturizer SPF 30

Best Mineral Sunscreen: Versed Guards Up SPF 35

Best Sunscreen for Dry Skin: Glow Recipe Watermelon Glow Niacinamide Sunscreen SPF 50

Best Sunscreen for Oily Skin: Supergoop! Unseen Sunscreen SPF 40

Best Sunscreen for Combination Skin: Live Tinted Hueguard 3-in-1 Broad Spectrum Mineral SPF 30 Primer

Best Sunscreen for Acne-Prone Skin: EltaMD UV Clear Broad-Spectrum SPF 46

Best Drugstore Sunscreen: Alba Botanica Sensitive Mineral Sunscreen Lotion SPF 30

Best Luxe Sunscreen: La Mer The Broad Spectrum SPF 50 Daily UV Protecting Fluid Sunscreen

Best Matte Sunscreen: Skinceuticals Physical Matte UV Defense SPF 50

Best Tinted Sunscreen: MDSolarSciences Mineral Tinted Creme SPF 30 Broad Spectrum UVA-UVB Sunscreen

Best Sunscreen for Sensitive, Eczema-Prone Skin: Neutrogena Sensitive Skin Face Liquid Mineral Sunscreen with Broad Spectrum SPF 50

Best-Smelling Sunscreen: Vacation Classic Lotion Broad Spectrum SPF 30 Sunscreen

Best Reef-Safe Sunscreen: MMSkincare Sasha Suncare Tinted Mineral Sunscreen SPF 50+

Best Sunscreen for Dark Skin: Black Girl Sunscreen Moisturizing Sunscreen Lotion SPF 30

Best Color-Correcting Sunscreen: Dr. Jart+ Cicapair Tiger Grass Color Correcting Treatment SPF 30

Best Natural Sunscreen: Kinship Self Reflect Probiotic Moisturizing Sunscreen Zinc Oxide SPF 32

Best Powder Sunscreen: Colorescience Sunforgettable Total Protection Brush-On Shield SPF 50

Best Body Sunscreen: Supergoop! Play Everyday Lotion SPF 50 Sunscreen

Best Budget-Friendly Body Sunscreen: Hawaiian Tropic Antioxidant Plus Sunscreen Lotion SPF 50

Next: I'm Lazy—These 10 Sunscreen Serums Save Me Time and Money (and Sun Damage)

Associate Beauty Editor

Katie Berohn is the associate beauty editor at Who What Wear. Previously, she worked as the beauty assistant for Good Housekeeping, Woman's Day, and Prevention magazines, all part of the Hearst Lifestyle Group. She graduated from the University of Colorado, Boulder, with a major in journalism and minor in technology, arts, and media, and earned her master's degree at NYU's graduate program for magazine journalism. In addition, Katie has held editorial internships at Denver Life magazine, Yoga Journal, and Cosmopolitan; a digital editorial internship at New York magazine's The Cut; a social good fellowship at Mashable; and a freelance role at HelloGiggles. When she's not obsessing over the latest skincare launch or continuing her journey to smell every perfume on the planet, Katie can be found taking a hot yoga class, trying everything on the menu at New York's newest restaurant, or hanging out at a trendy wine bar with her friends.