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"You might think of &lt;a href=\"/skin-care/skin-care-glossary\"&gt;vitamin C&lt;/a&gt; as a good ol&amp;#39; citrusy immunity booster, shelved in your medicine cabinet for when you need to kick a cold. But when applied topically, it&amp;#39;s a powerful addition to an anti-aging skin-care regimen. &amp;quot;Vitamin C is essential in collagen synthesis,&amp;quot; says Dendy Engelman, a dermatologist at Manhattan Dermatology &amp;amp; Cosmetic Surgery. How does the magic work? When applied to the skin directly, the &lt;a href=\"/skin-care/skin-care-glossary\"&gt;antioxidant&lt;/a&gt; neutralizes &lt;a href=\"/skin-care/skin-care-glossary\"&gt;free radicals&lt;/a&gt; (atoms or molecules with an unpaired electron) that age you. &amp;quot;When a free radical steals an electron from one of the proteins in a strand of collagen, it creates a tiny break in the strand,&amp;quot; Engelman explains. The more breaks you retain, the more damage you&amp;#39;ll see as skin begins to sag and wrinkle. Since vitamin C is an electron donor, Engelman says it helps reverse and prevent signs of aging. Use it to keep skin firm and youthful and protect yourself from UV rays. Here are 12 products that&amp;#39;ll do just that."^^<http://www.w3.org/2001/XMLSchema#string>
<http://www.allure.com/gallery/get-brighter-skin-vitamin-c>