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All about SPF – part 2 “Factors, duration of action. Which SPF is best to choose and how to use it?”
We will learn what SPF factors are, how to calculate the % of protection from UV rays, how much to apply in grams, tablespoons, or shots, as well as how to apply it, how long the protection factors last, and much more – in the second part of the article series about the influence of the sun on humans.