Sunscreen expires — usually three years from manufacture, and far sooner if it spent the summer in a hot car. How to check the date, the warning signs, and when to throw it out.

Melanin gives you a head start, not a free pass. Why deeper skin tones still need daily SPF, what actually causes white cast, and how to find a sunscreen that genuinely disappears.

Chlorine doesn't bleach your tan — it dries your skin, and dry skin sheds pigment faster. Here's what a pool day actually does to your glow and your sunscreen, and the routine that protects both.

Water reflects less UV than most people assume — under 10 percent. So why does everyone burn at the beach? The answer is reflection from the wrong surfaces, missing shade, and the spots sunscreen never reaches.

Blue light from your laptop is a tiny fraction of what one minute outdoors delivers — but visible light does affect pigmentation. Here's what the evidence actually supports and what's worth doing about it.