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What are age-related phenotypes? Defining the Visible and Invisible Marks of Time

According to a study involving over 5,600 adults, nearly 20% showed significantly accelerated aging in at least one organ, challenging the view of aging as a uniform process across the body. A person's aging process manifests through various observable and measurable traits, known as **age-related phenotypes**, which can differ significantly from person to person. These traits encompass everything from physical changes to invisible shifts in cellular function, offering a more nuanced picture of biological age than chronological age alone.