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Genetic study informs new understanding of dog-years

Dogs age quickly when they are young, then age less quickly after reaching maturity, with one-year-old dogs equivalent to 30-year-old people and 4-year-old dogs equivalent to 52-year-old people, according to a study published in Cell Systems. Researchers studied changing patterns of methyl groups in the genomes of Labrador retrievers and believe the formula translates across breeds and could help evaluate anti-aging products.

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