SPF 50+ is a sunscreen rating that indicates it is estimated to filter approximately 98% of UVB radiation, allowing only 1/50th (2%) of this radiation to reach your skin.
In essence, SPF 50+ provides a high level of protection against the sun's harmful UVB rays, which are primarily responsible for sunburn and contribute to skin cancer. While SPF values higher than 50 offer marginally better protection, the difference is minimal. The key is proper application and reapplication, regardless of the SPF number.
Here's a breakdown:
- UVB Protection: Primarily guards against sunburn and reduces the risk of skin cancer caused by UVB rays.
- Percentage of UVB Blocked: Blocks approximately 98% of UVB radiation.
- Importance of Application: SPF 50+ needs to be applied liberally and reapplied regularly (every two hours, or more frequently if swimming or sweating) to achieve its stated level of protection.
While SPF 50+ offers excellent protection when used correctly, no sunscreen can block 100% of UVB radiation. Therefore, it's crucial to combine sunscreen use with other sun-safe practices such as seeking shade, wearing protective clothing, and avoiding peak sun hours.
