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  2. We asked a dermatologist the most common questions about SPF ...

    www.aol.com/lifestyle/asked-dermatologist-most...

    Dr. Linkner: The most important part of a sunscreen label is the SPF or the sun protection factor level which gives you the interval time frame of which the sunscreen will prevent you from ...

  3. Does sunscreen expire? Should you wear it indoors ... - AOL

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    For example, SPF 50 stops 98% of UVB rays, while SPF 100 blocks 99% of them. No sunscreen provides 100% protection from damaging UV rays. ... “Above that can be helpful but the really profound ...

  4. Sunscreen - Wikipedia

    en.wikipedia.org/wiki/Sunscreen

    In the EU, sunscreen labels can only go up to SPF 50+ (initially listed as 30 but soon revised to 50). [76] Australia's Therapeutic Goods Administration increased the upper limit to 50+ in 2012. [77] [78] In its 2007 and 2011 draft rules, the US Food and Drug Administration (FDA) proposed a maximum SPF label of 50, to limit unrealistic claims.

  5. What to Know About Mineral and Chemical Sunscreens ... - AOL

    www.aol.com/heres-know-mineral-chemical...

    To help you out, we chatted with a few dermatologists for everything there is to know about mineral vs. chemical sunscreens, including how they work, whether or not one is better than the other ...

  6. 3 dermatologists explain why you still need to wear sunscreen ...

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    The American Academy of Dermatology recommends using a sunscreen that offers a minimum protection of SPF 30, broad-spectrum coverage so it will properly defend against UVA and UVB rays, both of ...

  7. Sun protective clothing - Wikipedia

    en.wikipedia.org/wiki/Sun_protective_clothing

    UPF (ultraviolet protection factor) represents the ratio of sunburn-causing UV without and with the protection of the fabric, similar to SPF (sun protection factor) ratings for sunscreen. While standard summer fabrics have UPF ~6, sun protective clothing typically has UPF ~30, which means that only 1 out of ~30 units of UV will pass through (~3%).