What Do SPF 30, 50 and 100 Really Mean? Dermatologists Explain Sun Protection

Sunscreen aisles are stacked with SPF numbers ranging from 15 to 100, and the higher tiers usually carry higher price tags. Whether those extra digits actually deliver better protection is a question dermatologists field every summer. What Does SPF Actually Mean on a Sunscreen Bottle? SPF, short for sun protection factor, measures how well a […]