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You’ve probably come across it somewhere: a gym scale that spits out a “metabolic age,” a wellness quiz that tells you your body is 43 when your…
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Your biological age tells a different story than the candles on your birthday cake. Through groundbreaking research in epigenetics, scientists…

The number of candles on your birthday cake tells one story, but your body might be telling another. While we conventionally measure age by the years we’ve lived, scientists now understand that our bodies can age at remarkably different rates…
Picture yourself at your last birthday celebration. The candles, the cake, the number that supposedly defines your age. But what if that number isn’t telling the whole story? What if your body’s internal clock—your biological age—is ticking at a…
An 85-year-old woman completes a marathon while some 40-year-olds struggle to climb a flight of stairs. A 65-year-old CEO launches a successful startup as others his age settle into retirement. These striking contrasts reveal an essential truth…
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