Why Do I Need to Apply Sunscreen Before Sun Exposure?
“Apply 20 minutes before sun exposure.” You’ve probably seen this label on your sunscreen before, and if you’re like most people, you’ve probably ignored it most of the time. Is early application necessary for both chemical (organic) and physical (inorganic) sunscreens, and why? Here’s what’s going on. All sunscreen ingredients absorb UV before application Applying sunscreen before going into the …