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New York – The loss of a close relative is a serious blow of fate that, according to the results of a long-term study in JAMA Network Open (2024; DOI: 10.1001/jamanetworkopen.2024.21869), has an impact on cell aging. As we age, changes occur in the methylation of DNA. This determines which genes a cell can use. In recent years, various researchers have developed epigenetic clocks that can be used to…