UVBsuojakertoimen

UVBsuojakertoimen refers to the Sun Protection Factor (SPF) specifically for UVB radiation. SPF is a measure of how well a sunscreen protects the skin from sunburn caused by the sun's ultraviolet B rays. A higher SPF number indicates greater protection. For example, SPF 30 means that it would take approximately 30 times longer for skin protected with that sunscreen to redden compared to unprotected skin, assuming the same amount of sun exposure. It is important to note that SPF only measures protection against UVB rays, which are the primary cause of sunburn. UVA rays, while not directly causing sunburn, can contribute to premature skin aging and skin cancer. Therefore, a sunscreen should ideally offer broad-spectrum protection, meaning it protects against both UVA and UVB radiation. Reapplying sunscreen regularly, especially after swimming or sweating, is crucial for maintaining its effectiveness, regardless of the SPF level.