Mineral sunscreen just sits there and blocks.

Yes, they work differently — mineral sunscreen sits on your skin and reflects/scatters UV, while chemical filters absorb UV and convert it into heat.

Zinc oxide and titanium dioxide are basically tiny mirrors. They form a physical barrier on top of your skin. The particles are small enough to be invisible (mostly), but they bounce UV rays away before they can get through.

Chemical filters like oxybenzone or avobenzone work by soaking into the top layers of your skin. They absorb UV radiation, then release it as heat. That’s why they need about 20 minutes to become effective — they have to get absorbed first.

The practical difference: mineral sunscreens are less likely to irritate sensitive skin or cause allergic reactions. They also start working immediately. But they tend to leave a white cast (especially on darker skin) and can feel thicker. Chemical sunscreens feel lighter and rub in clear, but some people react to the ingredients.

If you’re worried about absorption into your bloodstream, mineral is the safer route. The particles are too big to penetrate skin. The trade-off is you might look a little chalky.