4 Things to Know About Sunscreen and Tanning

Sunscreen prevents tanning by blocking UV radiation Sunscreen is designed to block or absorb UV rays, which cause tanning, burning, and skin damage. Used properly, it will largely prevent tanning.

No sunscreen blocks 100% of UV rays SPF 30 filters about 97% of UVB, SPF 50 about 98%. The remaining 2-3% can still trigger some pigment production if you’re exposed all day.

Most people don’t apply enough or reapply often enough User error is the main reason people still tan while using sunscreen. Apply a generous amount and reapply every two hours, especially after swimming.

Sunscreen alone won’t prevent tanning entirely If you want to avoid tanning completely, stay in the shade or wear protective clothing. Sunscreen is a tool, not a force field.