“…4 Research, including meta-analytic studies, link poor mental and physical health across the lifecourse with unstable family contexts such as interpersonal family violence, 5,6 parental suicide, and incarceration of a family member. [7][8][9][10][11] Although the negative impact of these exposures is established, only 1 study to date has examined the association between any of these exposures and telomere length, an established biological indicator of cellular aging and, more recently, toxic stress. 12,13 Exposure to early adversity increases risk for negative health outcomes across the life course, [14][15][16] yet it is unclear whether specific experience or cumulative exposure is the most biologically toxic.…”