New cheek swab test might help predict lifespan
DNA
A new test called CheekAge, based on a quick swab of cells in the mouth, might someday be used to predict how long a person has to live, developers report. The test tracks what are known as epigenetics: The way in which a person's environment or lifestyle affects how their genes function throughout the life span. Advertisement A key marker of epigenetics is DNA methylation, molecular changes in DNA segments that can alter a gene's activity without changing its essential composition. The new
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