How is the SPF measured in sunscreen?
SPF is determined using human experimentation. The test involves fair-skinned volunteers (people who burn most quickly). They MORE
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About SPF
SPF stands for Sun Protection Factor. It is the rating of how well a sunscreen or other product protects the skin against the sun’s rays, specifically the UVB rays that cause sunburns.
About People
People are, well, people, as the cliche saying goes. We are all people. The people of the United States, the people of Utah, the people of Chesterfield, Indiana, the people of football, working people, who care about other people and the people who spend way too much time playing video games are all people. Technically, grammatically speaking, people is the plural of person. It can also mean an ethnic or national group.
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