[{"type":"paragraph","text":"Choosing the right sunscreen is essential for protecting your skin from harmful UV rays."},{"type":"heading","text":"Understanding SPF Ratings"},{"type":"paragraph","text":"SPF measures protection against UVB rays. SPF 30 blocks 97% of UVB rays, while SPF 50 blocks 98%."},{"type":"heading","text":"UVA vs UVB Protection"},{"type":"paragraph","text":"Look for broad-spectrum protection that shields against both UVA (aging) and UVB (burning) rays."},{"type":"callout","text":"Expert tip: Reapply sunscreen every 2 hours, especially after swimming or sweating."}]