What does SPF stand for in sunscreen products?

The term SPF stands for Sun Protection Factor. This measurement indicates the level of protection a sunscreen provides against ultraviolet (UV) radiation, specifically UVB rays, which are the primary cause of sunburn and can contribute to skin cancer. The numeric value associated with SPF indicates how long you can expect to be protected from sunburn while wearing the product compared to not wearing any sunscreen at all.

For example, if a person normally begins to burn after 10 minutes of unprotected sun exposure, applying an SPF 30 sunscreen would theoretically allow them to be in the sun 30 times longer—about 300 minutes—without burning, provided they apply the sunscreen correctly and reapply it as directed.

Understanding SPF is crucial in skin care and in making informed choices for sun protection to minimize the risks of skin damage. This is why the correct answer focuses on "Sun Protection Factor," as it accurately describes the purpose of the measurement in relation to skin care.