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The Science: Sirtuins (protein enzymes) may extend the life of skin cells. When scientists increased the amount of sirtuins in worms, their lifespan grew significantly. Boosting these levels in skin cells can work similarly. "The suspected mechanism is essentially turning off the clock," says Ranella Hirsch, MD, a dermatologist in Boston. "Instead of going into decline, the skin would remain in its prime."
The Goal: Keep skin looking fresh. By enhancing the way your cells function and prolonging their longevity, your skin can function more optimally, especially in fighting key factors that lead to those well-known signs of aging (lines, wrinkles, and uneven tone, to name a few).