One of the most common reasons people skip sunscreen is the fear it will cause a vitamin D deficiency. Here's what dermatologists and real-world research actually say — and why you don't have to choose between protected skin and healthy vitamin D.

Most people apply only a quarter to half the sunscreen they need — which quietly cuts their real SPF in half. Here's exactly how much to use on your body and face, with two simple rules to get it right.

Sunscreen shouldn't leave dry skin tight or flaky. Here's how to choose a hydrating SPF and the application tricks that keep skin comfortable all day.

Yes, you can still tan with sunscreen on. Here's the science of how it works, why it's the safer way to glow, and how to do it without burning.