What does SPF stand for in relation to sun protection?

SPF stands for Sun Protection Factor, which is a measurement used to indicate the level of protection a sunscreen offers against UVB rays, the primary cause of sunburn and skin cancer. The number associated with SPF denotes how long a person can theoretically stay in the sun without getting sunburned compared to if they were not wearing any sunscreen. For example, an SPF of 30 suggests that it would take 30 times longer for a person to burn than without any sunscreen.

This designation is crucial for consumers seeking effective sun protection, as it helps them select products based on their time spent outdoors and their skin type. Higher SPF ratings indicate more protection, making it easier for individuals to make informed decisions regarding their skin safety when exposed to sunlight.