What does SPF stand for?

The correct answer is "Sun Protection Factor." SPF is a measurement that indicates the level of protection that a sunscreen provides against UVB rays, which are the primary cause of sunburn and skin cancer. The number associated with SPF indicates the theoretical amount of time a person can be exposed to the sun without getting sunburned while wearing the sunscreen. For instance, if you normally burn after 10 minutes in the sun, using an SPF 30 sunscreen would theoretically allow you to stay in the sun for 30 times longer (300 minutes) without burning, assuming the product is applied correctly.

Understanding the purpose of SPF is crucial for individuals seeking to protect their skin from harmful UV radiation. It reinforces the importance of using sunscreen as part of a comprehensive sun protection strategy, which should also include seeking shade, wearing protective clothing, and avoiding peak sun hours.

The other terms, while related to skin and sun protection, do not accurately capture the standard terminology used in dermatology and skincare for measuring UV protection. The correct terminology helps in effective communication about sun safety practices.