Rossi backs this up: “The SPF should be at least 25 30,” he tells Mental Floss, although he stresses that SPF 30 or above is best. The American Academy of Dermatology (AAD) notes on their website that you should select a sunscreen that offers broad-spectrum-meaning ultraviolet A (UVA) and UVB-protection, contains an SPF of 30 or higher, and is water-resistant. Dr. Rossi DERM MD, says that SPF is the “ratio of equivalent exposure by protected compared with unprotected skin.” Anthony Rossi, a board-certified dermatologist at the Memorial Sloan Kettering Cancer Center and founder of Dr. ![]() When it comes to sunscreen, most folks know it’s important to think about SPF, which stands for sun protection factor. With that in mind, we asked experts to shine a light on what you should (and should not) be looking for when you’re shopping for the best sunscreen. So what’s the average person to do? Slathering your skin with sunscreen is a good step, but given the plethora of products on the market today, it can be tough to narrow down what the best options are. He also notes that another reason to wear sunscreen daily is that UV radiation contributes to photoaging, which over time can degrade collagen and elastin in skin, and potentially lead to the development of brown spots and broken blood vessels. Karan Lal, a board-certified dermatologist based in Arizona, tells Mental Floss. “Every burn significantly increases your risk of developing skin cancer,” Dr. You may even be surprised to learn that one in five Americans will develop skin cancer in their lifetime. ![]() While we often associate sunscreen with summer days at the beach, most experts agree that you should be protecting your skin from the sun’s harmful ultraviolet ( UV) rays year-round.Įven on days dotted with cloudy skies, up to 80 percent of the sun’s rays can penetrate your skin.
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