Which Sunscreen Is Best? SPF 30, 50, 100? Broad- or Multi-Spectrum?

Putting its possible dangers aside, sunscreen—which in its present forms, dates back about 100 years—can protect us from getting sunburnt. And if you’re not into broad-brimmed hats, long-sleeved shirts, and permanently sporting an umbrella at the beach, sunscreen is likely the best option for you. The question is, with so many d...