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  2. 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.

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

    www.aol.com/lifestyle/does-sunscreen-expire-wear...

    What does SPF mean — and which one should you use? ... 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.

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

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

    As SPF levels increase beyond 50, the formulations tend to be thicker and leave a chalkier appearance, and most people will under compensate that white chalkiness by not utilizing the right amount ...

  5. 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%).

  6. Ultraviolet index - Wikipedia

    en.wikipedia.org/wiki/Ultraviolet_index

    Reduce time in the sun between 10 a.m. and 4 p.m. If outdoors, seek shade and wear sun-protective clothing, a wide-brimmed hat, and UV-blocking sunglasses. Generously apply broad spectrum SPF 50+ sunscreen every 1.5 hours, even on cloudy days, and after swimming or sweating. Bright surfaces, such as sand, water, and snow, will increase UV exposure.

  7. 3 dermatologists explain why you still need to wear sunscreen ...

    www.aol.com/lifestyle/3-dermatologists-explain...

    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 ...