Researchers at Mass General Brigham, the Broad Trauma Initiative, and Harvard T.H. Chan School of Public Health have identified scalable, blood-based biomarkers associated with post-traumatic stress disorder (PTSD) across multiple organ systems. The findings, published in Molecular Psychiatry, suggest that routine laboratory tests could one day inform PTSD care by capturing its effects on the body and helping explain why PTSD is linked to many chronic physical health problems.