Robert Wood Johnson University Hospital



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What are sunscreens?

Sunscreens protect the skin against sunburns. Sunscreens also play an important role in blocking the penetration of ultraviolet (UV) radiation, which damages the skin and can lead to skin cancer. However, no sunscreen blocks UV radiation 100 percent.

What is the difference between a sunscreen and a sunblock?

The terminology used on sunscreen labels can be confusing. The protection provided by a sunscreen is indicated by the sun protection factor (SPF) listed on the product label. A sunblock is considered to be any sunscreen with an SPF of 15 or more. In theory, sunscreens protect an individual during an incident of ultraviolet B (UVB) radiation exposure according to the following:

How to select a sunscreen

A sunscreen protects from sunburn and minimizes suntan by reflecting UV rays. Selecting a good sunscreen is important in protecting the skin. Consider the following information:

How to apply a sunscreen

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Online Resources of Skin Cancer


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