COMPARING SUNSCREENS BY ABSORPTION - westminster 2025

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How to select a sunscreen Broad spectrum: The words broad spectrum means that the sunscreen can protect your skin from both types of harmful UV rays the UVA rays and the UVB rays. SPF 30 or higher: The American Academy of Dermatology recommends that you select a sunscreen with an SPF rating of 30 or higher.
The Little Fires Everywhere star said she wears lots of SPF every day after basking in the sun as a teenager. Witherspoons favorite sunscreen is Elizabeth Ardens Prevage City Smart SPF 50 Hydrating Shield.
Broad spectrum SPF refers to sunscreens that protect the skin from both UVA and UVB rays. Even with a high SPF (sun protection factor), if a sunscreen isnt broad spectrum, you wont be protected from all UVA rays.
Best Overall: EltaMD UV Clear Face Sunscreen SPF 46. Best Mineral Sunscreen: InnBeauty Project Mineral Sun Glow Broad Spectrum SPF 43. Best Tinted Sunscreen: Colorescience Sunforgettable Total Protection Face Shield Flex SPF. Best for Dry Skin: Summer Fridays ShadeDrops Mineral Milk Sunscreen SPF 30.
CW: wavelength at which 90% of the cumulative area under the total solar radiation absorbance curve from 290400 nm occurs. Broad spectrum generally designates CW 370 nm, indicating greater protection against longer wavelength UVA rays.

People also ask

Chemical sunscreen ingredients form a thin protective film that absorbs UV radiation before it penetrates the skin. Sunscreen products that contain chemical absorbers are sometimes called organic sunscreens.
Answer: Mostly UVB light. The UVB range is ~280-320 nm while the UVA range is ~320-400 nm. The absorption range runs from 255 nm to 345 nm and thus covers more of the UVB spectrum than the UVA one. In addition, from the peak at 310 nm the absorbance slope toward the shorter wavelengths is more gradual.
SPF 100+ sunscreen is more protective against sunburn than SPF 50+ in actual use: Results of a randomized, double-blind, split-face, natural sunlight exposure clinical trial. SPF 100+ sunscreen was significantly more effective in protecting against sunburn than SPF 50+ sunscreen in actual use conditions.

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