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Does SPF 50 block all UV rays?

SPF 50 does not block all UV rays. It is designed to filter out about 98% of UVB rays, which are primarily responsible for sunburn and skin damage, but it does not provide complete protection. Additionally, SPF ratings do not measure UVA protection, which can also harm the skin.

Key points:

• SPF 50 blocks around 98% of UVB rays.
• It does not offer total protection from UV radiation.
• UVA rays can still penetrate the skin despite high SPF.
• Regular reapplication is important for effective sun protection.

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