 Adverse childhood experiences, ACEs, are events that occur before the age of 18 and can have long-term negative consequences on health and well-being. This study found that people who experienced multiple ACEs had higher rates of various health problems, including substance abuse, sexual risk-taking, mental ill health, and problematic drug use. These results suggest that multiple ACEs should be taken into account when assessing an individual's overall health and well-being. This article was authored by Professor Karen Hughes, PhD, Professor Marke Bellies, DSC, Catherine A. Hardcastle, Master of Science, and others.