Do African Americans and people with dark skin need to use sunscreen?

African-Americans and people with dark skin have a natural SPF 16 UV protection, although dark skin blocks vitamin D3 production even more. So darker-skinned people require 10 to 20 times the sun exposure length (which equates to about two hours of exposure) than lighter-skinned people to build up the same amount of vitamin D. While dark skin does offer this SPF protection, it's not enough to protect the skin fully so African Americans and people with dark skin should still use sunscreens when they'll be in the sun for prolonged periods.

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