In relation to skincare, what does SPF indicate?

SPF stands for Sun Protection Factor, which is a measure of how well a sunscreen protects the skin from ultraviolet (UV) radiation, specifically UVB rays that can cause sunburn and contribute to skin cancer. The number associated with SPF indicates the level of protection provided; for example, SPF 30 filters about 97% of UVB rays compared to SPF 15, which filters approximately 93%.

Understanding SPF is crucial in skincare as it helps consumers make informed decisions about how to prevent sun damage. It is recommended to use broad-spectrum sunscreens, which protect against both UVA and UVB rays, to provide comprehensive skin protection. This is essential for maintaining skin health and preventing premature aging, discoloration, and potential skin cancers due to sun exposure.