Everything you need to know about sunscreen

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Beecker describes SPF—which stands for sun protection factor—as a multiple of how long it takes skin to burn “In Canada, we always recommend a minimum of SPF 30,” she says.


(Julia Paolercio/ Chatelaine) — Whether you’re concerned about sunburns, skin cancer or premature signs of aging, wearing sunscreen every day is the best thing you can do for your skin. But how exactly does it protect your skin—and how do you pick the best formula for your needs?

We asked Dr. Monica Li, a Vancouver-based dermatologist and clinical instructor at the University of British Columbia’s Department of Dermatology and Skin Science, and Dr. Jennifer Beecker, a dermatologist in Ottawa and the vice-president of the Canadian Dermatology Association, to answer all our burning questions about SPF.

The sun radiates two types of potentially harmful UV rays: UVB, which are responsible for sunburns and skin cancer, and UVA, which cause visible signs of aging and hyperpigmentation. (…)

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