Resveratrol, an antioxidant, is found in red wine

Sirtuin activators What they are: Sirtuins are enzymes that have been shown to potentially repair DNA and regulate genes connected with aging. But first, the sirtuins need to be activated by an agent such as resveratrol, commonly found in red wine, or epigallocatechin, found in green tea. What they do: “Sirtuins allow us to address skin care from a totally different direction,” says Dr. John Gross, director of cosmetic surgery education at USC. Instead of combating the appearance of fine lines, products that activate sirtuins can potentially “slow down the clock” and prevent signs of aging, he says. Status: “Resveratrol still has a long way to go in clinical studies,” says Dr. Vermén Verallo-Rowell. But coupled with its antioxidant and anti-inflammatory properties, it’s worth keeping an eye on. More in Image: • 20 ways to upgrade your style in 2009 | Photos • Photos: The ones to watch in 2009 • Hope or hype: Stila's Talking Palettes
Stephen Osman/ Los Angeles Times
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