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What percentage of UV rays does SPF 50 block?

SPF 50 blocks about 98% of UVB rays. This means that while it provides a high level of protection, it does not completely eliminate exposure to UV radiation. Therefore, some UV rays can still reach the skin even when using SPF 50 sunscreen.

Key points:

• SPF measures protection against UVB rays.
• Higher SPF numbers indicate greater UVB protection.
• No sunscreen can block 100% of UV rays.
• Reapplication is important for effective sun protection.

This text has been fact-checked for accuracy by medino's clinical team.