What is Biological Age, and Does it Tell Us Anything Useful?
<p>HHave you ever noticed that some of your friends, who are the same age as you, might seem older?</p>
<p>Maybe their hair has started graying before yours. Maybe they aren’t as fit and can’t keep up on more strenuous hikes. Maybe their skin shows more age and wrinkles.</p>
<p>Two people can be the same age, according to calendars, but seem quite different in physical appearance. There’s another way of measuring age, one that doesn’t use birthdays, employed by biologists. It’s called <strong>biological age</strong>, and it can help researchers test whether a treatment would let you live longer — but the term is also used to scam you out of money.</p>
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