SPFväärtus

SPFväärtus refers to the Sun Protection Factor value found on sunscreen products. It indicates how well a sunscreen protects the skin from UVB radiation, which is the primary cause of sunburn. The SPFväärtus is a numerical rating system, with higher numbers offering greater protection. For example, SPF 15 filters out approximately 93% of UVB rays, SPF 30 blocks about 97%, and SPF 50 filters out around 98%.

It is important to understand that SPFväärtus only measures protection against UVB rays and does not directly indicate protection against UVA rays, which contribute to skin aging and can also cause cancer. Many sunscreens now also offer broad-spectrum protection, meaning they protect against both UVA and UVB radiation.

The effectiveness of any SPFväärtus is dependent on proper application. This includes applying a sufficient amount of sunscreen to all exposed skin and reapplying it regularly, especially after swimming, sweating, or towel drying. Using a sunscreen with an adequate SPFväärtus and practicing safe sun habits, such as seeking shade and wearing protective clothing, are crucial for preventing sun damage and reducing the risk of skin cancer.