If you want to know your chronological age, simply count the candles on your next birthday cake. Calculating your biological age, though, is a little more complicated.
Chronological age is the number of years between your birth and now; it's purely time-based. Biological age, on the other hand, describes the progressive breakdown of an individual's physiological and molecular systems over time; it's a measure of how "aged" the body is. The calculation aims to answer the question of how well your systems, organs and cells are working compared to an average, healthy baseline.
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