Do you need SPF 30, 50 or 100? Dermatologists answer your burning sunscreen questions

This article originally appeared on PolitiFact The numbers that signal summer's approach are here: The countdown to the last day of school. A 90-degree forecast. And, of course, SPF 30. Or 50? Or maybe it's time to break out SPF 100? SPF stands for sun protection factor. That sounds simple enough, but what these ubiquitous figures mean in practice can be complicated. We asked two board-certified dermatologists to answer our burning SPF questions.

Do you need SPF 30, 50 or 100? Dermatologists answer your burning sunscreen questions. This article originally appeared on PolitiFact The numbers that signal summer's approach are here: The countdown to the last day of school. A 90-degree forecast. And, of course, SPF 30. Or 50? Or maybe it's time to break out SPF 100? SPF stands for sun protection factor. That sounds simple enough, but what these ubiquitous figures mean in practice can be complicated. We asked two board-certified dermatologists to answer our burning SPF questions. What do different SPF numbers actually mean? The numbers tell you how well a sunscreen protects your skin against ultraviolet B, or UVB, rays — the type of ultraviolet radiation most responsible for causing sunburns. The higher the SPF, the more these UVB rays are blocked, said Dr. Adewole Adamson, a dermatolog...