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2. 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 ...

3. The best sunscreens dermatologists use

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   Neutrogena Beach Defense Spray Sunscreen SPF 70. More options. $10 at Amazon $13 at Walmart. Best mineral spray sunscreen ... $15 at Amazon. Coola Organic Face Sunscreen Broad Spectrum SPF 50 .

4. 19 Best Drugstore Sunscreens to Protect Your Face From ... - AOL

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   Moisturizing Sunscreen Lotion SPF 30. $15.99. ulta.com. Silk Hydration Clear Spray Sunscreen SPF 30. ... Customer review: "I just spray this on before I walk out the door. I was recently on a 2 ...

5. Sunscreen - Wikipedia

   en.wikipedia.org/wiki/Sunscreen

   The sun protection factor (SPF rating, introduced in 1974) is a measure of the fraction of sunburn-producing UV rays that reach the skin. For example, "SPF 15" means that 1 ⁄ 15 of the burning radiation will reach the skin, assuming sunscreen is applied evenly at a thick dosage of 2 milligrams per square centimeter [65] (mg/cm 2). It is ...

6. Octocrylene - Wikipedia

   en.wikipedia.org/wiki/Octocrylene

   Octocrylene can penetrate into the skin where it acts as a photosensitizer, resulting in an increased production of free radicals under illumination. [2] It may also pass through the skin, into the blood stream, eventually being metabolized and excreted in urine in form of its metabolites.

7. Sun tanning - Wikipedia

   en.wikipedia.org/wiki/Sun_tanning

   In 1962, sunscreen commenced to be SPF rated, although SPF labeling in the US was not standardized by the FDA until 1978. In the 1970s, Mattel introduced Malibu Barbie, which had tanned skin and further popularized sun tanning among women. [44] [45] In 1978, both sunscreen with an SPF 15 rating as well as tanning beds first appeared.