Four Facts about Sunscreen You Never Knew

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    Spring upon us, and that means one thing: time to break out the sunscreen! Since UV light is responsiblefor over 80 percent of the signs of aging, sunscreen is the Holy Grail of anti-aging products. Yet, despitethe fact that over $550 million worth of sunscreen is sold in the U.S. alone each year, almost no one seemsto know all of the essentials about it.jordan high heels  Here are five of the most little-known facts about every dermatologist’sfavorite product:
    1.) 1 Divided by the SPF = the Percent of Rays that Get Through
    Unless a product is labeled as “Broad Spectrum,” SPF numbers only assess short-wavelength UVBprotection, not long-wavelength UVA protection. UVB rays contribute most to sunburns and inflammation, sounderstanding how SPF numbers work is vital.
    To figure out the level of protection in a sunscreen,Scarpe MBT  divide 1 by the SPF number. That equals thepercentage of rays that sneak past the product. For example, with SPF 25: 1/25 = 4 percent of rays passthrough. With SPF 50, 1/50 = 2 percent of rays pass through. You may notice as you get higher, thepercentage of benefit decreases—SPF 100 is only one percent more effective than SPF 50, but SPF 50 is2 percent more effective than SPF 25. For this reason, the European Union does not allow sunscreenmanufacturers to post that a sunscreen rating is higher than 50; instead, packaging there can only state amaximum of “50+.” I say go for the highest rating possible, but I do see the benefit of wanting to preventconsumers from being mislead.
    2.) Zinc Oxide > Titanium Dioxide
    The longer a ray’s wavelength, the more it contributes to aging. UVA rays are longer than UVB rays,Nike heels   soremember that UVA = aging, while UVB = burning. Among the UVA protectors, zinc oxide is the king, as zincoxide absorbs more UV light than competitor titanium dioxide in the long-wave UVA spectrum.
    Despite this, many manufacturers still continue to use titanium oxide in place of zinc oxide, because it iseasier to make titanium oxide micronized and hence invisible on the skin. Zinc oxide, unfortunately, tends toleave a white residue on the skin. The best policy? Find a sunscreen with a mix of titanium and zinc oxides,Jordan Heels so you’re covered through the entire spectrum - without necessarily looking like it!

    3.) Antioxidants Can Boost Sunscreen’s Efficacy
    UV rays are damaging for many reasons, with oxidation being at the forefront. UV light can cause electronsto go haywire, inducing damage in many parts of the cell. It is these compounded disruptions that result inmany unwanted signs of aging over time.
    Luckily, sunscreen’s UV-blocking powers can be enhanced by using antioxidant serums underneath.Air Jordan High Heels  Forinstance, a combination of 15% L-ascorbic acid (vitamin C) and 1% tocopherol (vitamin E) have beenshown to boost protection four-fold when applied under sunscreen, in a study published in the AmericanJournal of Dermatology in 2005.
    4.) Retinyl Palmitate in Sunscreen Might Not Be Bad for You
    According to alarming research from the Environmental Working Group in 2010, skin tumors and lesionsdeveloped up to 21 percent faster in mice treated with a 0.1-0.5 percent retinyl woman jordan heels palmitate cream. This iscertainly disturbing, but other scientists and dermatologists have refuted this finding. Although vitamin Abreaks down in sunlight and can potentially form free radicals, most sunscreens with retinyl palmitateinclude other antioxidants that prevent this from occurring. As Dr. Steven Q. Wang said of theEnvironmental Working Group study, “It is important to note that the mice included in the [...] study arehighly susceptible to the impact of UV radiation and can develop skin tumors in the presence of UVexposure within weeks, even in the absence of retinyl palmitate.” Dermatologist Henry W. Lim adds, “Whenretinyl palmitate is used in sunscreen, it can serve as an antioxidant to improve product performance.”
    Bottom Line
    There’s far more to sunscreen than what is listed on the bottle. nike high heels It’s unfortunate that more efforts are notdirected towards teaching the public what they really need to know to prevent skin cancer and even signs ofpremature aging, but hopefully this helps somewhat. If you have questions or comments, please continuethe conversation with me at Future Derm.