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What percentage of UV rays does SPF 30 block?

SPF 30 blocks about 97% of UVB rays. This means that if you use SPF 30 sunscreen, it allows only a small percentage of UVB rays to reach your skin. It's important to apply it properly to ensure maximum protection.

Key points:

• SPF measures the level of protection against UVB rays.
• Higher SPF numbers block more UVB rays.
• No sunscreen can block 100% of UV rays.
• Proper application is essential for effective sun protection.

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